TUYN TP CC THI I HC, CAO NG

TUYN TP CC THI I HC, CAO NG

T NM 2007 N 2011

A. HA HC I CNG

1. Nguyn t, bng tun hon cc nguyn t ha hc lin kt ha hc: 2

- Tp nguyn tCu 1: Mt nguyn t ca nguyn t X c tng s ht proton, ntron, electron l 52 v c s khi l 35. S hiu nguyn t ca nguyn t X lA. 18.

B. 23.

C. 17.

D. 15. thi TSC 2009

Cu 2: Trong hp cht ion XY (X l kim loi, Y l phi kim), s electron ca cation bng s electron ca anion v tng s electron trong XY l 20. Bit trong mi hp cht, Y ch c mt mc oxi ha duy nht. Cng thc XY lA. MgOB. AlNC. NaFD. LiF thi TSHC khi B 2007

Cu 3: Nguyn t ca nguyn t X c tng s ht electron trong cc phn lp p l 7. S ht mang in ca mt nguyn t Y nhiu hn s ht mang in ca mt nguyn t X l 8 ht. Cc nguyn t X v Y ln lt l (bit s hiu nguyn t ca nguyn t: Na = 11; Al = 13; P = 15; Cl = 17; Fe = 26)A. Fe v Cl.

B. Na v Cl.

C. Al v Cl.

D. Al v P. thi TSC 2008

- ng vCu 4: Trong t nhin, nguyn t ng c hai ng v l v . Nguyn t khi trung bnh ca ng l 63,54. Thnh phn phn trm tng s nguyn t ca ng v lA. 27%B. 50C. 54%D. 73%. thi TSC 2007

Cu 5: Cc kim loi X, Y, Z c cu hnh electron nguyn t ln lt l: 1s22s22p63s1; 1s22s22p63s2; 1s22s22p63s23p1. Dy gm cc kim loi xp theo chiu tng dn tnh kh t tri sang phi l:

A. Z, X, Y.B. Y, Z, X.C. Z, Y, X.D. X, Y, Z. (TSC 2010)

Cu 6: Nhn inh nao sau y ung khi noi v 3 nguyn t :

A. X, Y thuc cung mt nguyn t hoa hocB. X va Z co cung s khi

C. X va Y co cung s ntronD. X, Z la 2 ng vi cua cung mt nguyn t hoa hoc (H A 2010)

Cu 7: Trong t nhin clo c hai ng v bn: chim 24,23% tng s nguyn t, cn li l . Thnh phn % theo khi lng ca trong HClO4 l:

A. 8,92%B. 8,43%C. 8,56%D. 8,79% (H khi B 2011)

- Cu hnh, v tr, bin thin tnh cht

Cu 8: Dy gm cc ion X+, Y- v nguyn t Z u c cu hnh electron 1s22s22p6 l:A. Na+, Cl-, Ar.B. Li+, F-, Ne.C. Na+, F-, Ne.D. K+, Cl-, Ar. thi TSHC khi A 2007

Cu 9: Anion X- v cation Y2+ u c cu hnh electron lp ngoi cng l 3s23p6. V tr ca cc nguyn t trong bng tun hon cc nguyn t ha hc lA. X c s th t 17, chu k 4, nhm VIIA (phn nhm chnh nhm VII); Y c s th t 20, chu k 4, nhm IIA (phn nhm chnh nhm II).

B. X c s th t 18, chu k 3, nhm VIA (phn nhm chnh nhm VI); Y c s th t 20, chu k 4, nhm IIA (phn nhm chnh nhm II).

C. X c s th t 17, chu k 3, nhm VIIA (phn nhm chnh nhm VII); Y c s th t 20, chu k 4, nhm IIA (phn nhm chnh nhm II).

D. X c s th t 18, chu k 3, nhm VIIA (phn nhm chnh nhm VII); Y c s th t 20, chu k 3, nhm IIA (phn nhm chnh nhm II). thi TSHC khi A 2007

Cu 10: Cu hnh electron ca ion X2+ l 1s22s22p63s23p63d6. Trong bng tun hon cc nguyn t ho hc, nguyn t X thuc A. chu k 4, nhm VIIIA.B. chu k 4, nhm IIA.

C. chu k 3, nhm VIB.

D. chu k 4, nhm VIIIB. thi TSHC khi A 2009

Cu 11: Nguyn t ca nguyn t X c electron mc nng lng cao nht l 3p. Nguyn t ca nguyn t Y cng c electron mc nng lng 3p v c mt electron lp ngoi cng. Nguyn t X v Y c s electron hn km nhau l 2. Nguyn t X, Y ln lt l A. kim loi v kim loi.B. phi kim v kim loi.

C. kim loi v kh him.

D. kh him v kim loi. thi TSC 2009

Cu 12: Trong mt nhm A (phn nhm chnh), tr nhm VIIIA (phn nhm chnh nhm VIII), theo chiu tng ca in tch ht nhn nguyn t th A. m in gim dn, tnh phi kim tng dn.

B. tnh phi kim gim dn, bn knh nguyn t tng dn.

C. tnh kim loi tng dn, m in tng dn.

D. tnh kim loi tng dn, bn knh nguyn t gim dn. thi TSHC khi B 2007

Cu 13: Cho cc nguyn t M (Z = 11), X (Z = 17), Y (Z = 9) v R (Z = 19). m in ca cc nguyn t tng dn theo th tA. Y < M < X < R.B. R < M < X < Y.C. M < X < Y < R.D. M < X < R < Y. thi TSC 2007

Cu 14: Bn knh nguyn t ca cc nguyn t: 3Li, 8O, 9F, 11Na c xp theo th t tng dn t tri sang phi lA. F, Na, O, Li.B. F, Li, O, Na.C. F, O, Li, Na.D. Li, Na, O, F. thi TSHC khi A 2008

Cu 15: Cho cc nguyn t: K (Z = 19), N (Z = 7), Si (Z = 14), Mg (Z = 12). Dy gm cc nguyn t c sp xp theo chiu gim dn bn knh nguyn t t tri sang phi l:A. N, Si, Mg, K.B. K, Mg, Si, N.C. K, Mg, N, Si.D. Mg, K, Si, N. thi TSHC khi B 2009

Cu 16: Dy cc nguyn t sp xp theo chiu tng dn tnh phi kim t tri sang phi l:A. P, N, O, F.

B. P, N, F, O.

C. N, P, O, F.

D. N, P, F, O. thi TSHC khi B 2008

Cu 17: Lin kt ho hc gia cc nguyn t trong phn t H2O l lin kt

A. cng ho tr khng phn cc.B. cng ho tr phn cc.

C. ion.

D. hiro. (TSC 2010)

Cu 18: Cac nguyn t t Li n F, theo chiu tng cua in tich hat nhn thi

A. Ban kinh nguyn t va m in u tng

B. Ban kinh nguyn t tng, m in giam

C. Ban kinh nguyn t giam, m in tng

D. Ban kinh nguyn t va m in u giam (H A 2010)

Cu 19: Mt ion M3+ c tng s ht proton, ntron, electron l 79, trong s ht mang in nhiu hn s ht khng mang in l 19. Cu hnh electron ca nguyn t M l

A. [Ar]3d54s1.

B. [Ar]3d64s2.

C. [Ar]3d64s1.

D. [Ar]3d34s2. (H B 2010)- Ha tr cao nht vi oxi, trong hp cht kh vi H

Cu 20: Cng thc phn t ca hp cht kh to bi nguyn t R v hiro l RH3. Trong oxit m R c ho tr cao nht th oxi chim 74,07% v khi lng. Nguyn t R lA. As.

B. N.

C. S.

D. P. thi TSHC khi B 2008

Cu 21: Nguyn t ca nguyn t X c cu hnh electron lp ngoi cng l ns2np4. Trong hp cht kh ca nguyn t X vi hiro, X chim 94,12% khi lng. Phn trm khi lng ca nguyn t X trong oxit cao nht lA. 50,00%.

B. 27,27%.

C. 60,00%.

D. 40,00%. thi TSHC khi A 2009

- D on lin kt, x s lin kt, phn cc lin kt, mng tinh thCu 22: Hp cht trong phn t c lin kt ion lA. NH4Cl.

B. HCl.

C. H2O.

D. NH3. thi TSHC khi A 2008

Cu 23: Dy gm cc cht trong phn t ch c lin kt cng ho tr phn cc l: A. O2, H2O, NH3.B. H2O, HF, H2S.C. HCl, O3, H2S.D. HF, Cl2, H2O. thi TSC 2009

Cu 24: Nguyn t ca nguyn t X c cu hnh electron 1s22s22p63s23p64s1, nguyn t ca nguyn t Y c cu hnh electron 1s22s22p5. Lin kt ho hc gia nguyn t X v nguyn t Y thuc loi lin ktA. kim loi. B. cng ho tr. C. ion. D. cho nhn. thi TSC 2008

Cu 25: Pht biu no sau y l ng ? A. Photpho trng c cu trc tinh th nguyn t. B. th rn, NaCl tn ti di dng tinh th phn t.

C. Nc thuc loi tinh th phn t. D. Kim cng c cu trc tinh th phn t. thi TSHC khi B 2009

Cu 26: Trong bng tun hon cc nguyn t ho hc, nguyn t X nhm IIA, nguyn t Y nhm VA. Cng thc ca hp cht to thnh 2 nguyn t trn c dng l:

A. X3Y2B. X2Y3C. X5Y2D. X2Y5 (C 2011)

- D on lin kt, x s lin kt, phn cc lin kt, mng tinh thCu 27: Mc phn cc ca lin kt ho hc trong cc phn t c sp xp theo th t gim dn t tri sang phi l:

A. HBr, HI, HCl B. HI, HBr, HCl C. HCl , HBr, HI D. HI, HCl , HBr (C 2011)

Cu 28: Cc cht m phn t khng phn cc l:

A. HBr, CO2, CH4.

B. Cl2, CO2, C2H2.

C. NH3, Br2, C2H4.

D. HCl, C2H2, Br2. (H B 2010)Cu 29: Khi so snh NH3 vi NH4+, pht biu khng ng l:

A. Trong NH3 v NH4+, nit u c s oxi ha -3.

B. NH3 c tnh baz, NH4+ c tnh axit.

C. Trong NH3 v NH4+, nit u c cng ha tr 3.

D. Phn t NH3 v ion NH4+ u cha l/k cng ha tr. (H khi A 2011)

Cu 30: Pht biu no sau y l sai?

A. Tinh th nc , tinh th iot u thuc loi tinh th phn t.

B. Trong tinh th NaCl, xung quanh mi ion u c 6 ion ngc du gn nht.

C. Tt c cc tinh th phn t u kh nng chy v kh bay hi.

D. Trong tinh th nguyn t, cc nguyn t lin kt vi nhau bng lin kt cng ha tr. (H khi B 2011)

2. Phn ng oxi ha kh, tc phn ng v cn bng ha hc: 2 + 0,5

- Vai tr oxh kh, cn bng PT

Cu 31: Cho cc phn ng sau:a) FeO + HNO3 (c, nng) b) FeS + H2SO4 (c, nng) c) Al2O3 + HNO3 (c, nng) d) Cu + dung dch FeCl3 e) CH3CHO + H2

f) glucoz + AgNO3 trong dung dch NH3 g) C2H4 + Br2 h) glixerol (glixerin) + Cu(OH)2 Dy gm cc phn ng u thuc loi phn ng oxi ha - kh l:

A. a, b, d, e, f, h.B. a, b, d, e, f, g.C. a, b, c, d, e, h.D. a, b, c, d, e, g. thi TSHC khi A 2007

Cu 32: Cho tng cht: Fe, FeO, Fe(OH)2, Fe(OH)3, Fe3O4, Fe2O3, Fe(NO3)2, Fe(NO3)3, FeSO4, Fe2(SO4)3, FeCO3 ln lt phn ng vi HNO3 c, nng. S phn ng thuc loi phn ng oxi ho - kh lA. 8.B. 5.C. 7.D. 6. thi TSHC khi A 2007

Cu 33: Cho cc phn ng:Ca(OH)2 + Cl2 CaOCl22H2S + SO2 3S + 2H2O

2NO2 + 2NaOHNaNO3 + NaNO2 + H2O 4KClO3 + SO2 3S + 2H2O

O3 O2 + O

S phn ng oxi ho kh l

A. 5.

B. 4.

C. 2.

D. 3. thi TSHC khi B 2008

Cu 34: Tng h s (cc s nguyn, ti gin) ca tt c cc cht trong phng trnh phn ng gia Cu vi dung dch HNO3 c, nng lA. 10.

B. 11.

C. 8.

D. 9. thi TSHC khi A 2007

Cu 35: Cho phng trnh ho hc: Fe3O4 + HNO3 Fe(NO3)3 + NxOy + H2O Sau khi cn bng phng trnh ho hc trn vi h s ca cc cht l nhng s nguyn, ti gin th h s ca HNO3 lA. 13x - 9y.B. 46x - 18y.C. 45x - 18y.D. 23x - 9y. thi TSHC khi A 2009

Cu 36: Trong phn ng t chy CuFeS2 to ra sn phm CuO, Fe2O3 v SO2 th mt phn t CuFeS2 sA. nhn 12 electron.B. nhn 13 electron.

C. nhng 12 electron.

D. nhng 13 electron. thi TSHC khi B 2007

Cu 37: Cho bit cc phn ng xy ra sau:2FeBr2 + Br2 2FeBr3

2NaBr + Cl2 2NaCl + Br2Pht biu ng l:A. Tnh kh ca Br- mnh hn ca Fe2+.B. Tnh oxi ha ca Cl2 mnh hn ca Fe3+.C. Tnh kh ca Cl- mnh hn ca Br -.D. Tnh oxi ha ca Br2 mnh hn ca Cl2. thi TSHC khi B 2008

Cu 38: Cho dy cc cht v ion: Zn, S, FeO, SO2, N2, HCl, Cu2+, Cl-. S cht v ion c c tnh oxi ha v tnh kh lA. 7.

B. 5.

C. 4.

D. 6. thi TSHC khi A 2009

Cu 39: Cho dy cc cht v ion: Cl2, F2, SO2, Na+, Ca2+, Fe2+, Al3+, Mn2+, S2-, Cl-. S cht v ion trong dy u c tnh oxi ho v tnh kh lA. 5.

B. 4.

C. 3.

D. 6. thi TSHC khi B 2008

Cu 40: Cho phn ng:

Na2SO3 + KMnO4 + NaHSO4 Na2SO4 + MnSO4 + K2SO4 + H2O.

Tng h s ca cc cht (l nhng s nguyn, ti gin) trong phng trnh phn ng l

A. 47.B. 27.C. 31.D. 23. (TSC 2010)

Cu 41: Nguyn t S ng vai tr va l cht kh, va l cht oxi ho trong phn ng no sau y?

A. S + 2Na Na2S.B. S + 6HNO3 (c) H2SO4 + 6NO2 + 2H2O.

C. S + 3F2 SF6.D. 4S + 6NaOH(c) 2Na2S + Na2S2O3 + 3H2O. (TSC 2010)

Cu 42: Cho phn ng : 6FeSO4 + K2Cr2O7 + 7H2SO4 ( 3Fe2(SO4)3 + Cr2(SO4)3 + K2SO4 +7H2O

Trong phn ng trn, cht oxi ha v cht kh ln lt l

A. FeSO4 v K2Cr2O7. B. K2Cr2O7 v FeSO4. C. H2SO4 v FeSO4. D. K2Cr2O7 v H2SO4. (C 2011)Cu 43: Trong phn ng: K2Cr2O7 + HCl ( CrCl3 + Cl2 + KCl + H2O

S phn t HCl ng vai tr cht kh bng k ln tng s phn t HCl tham gia phn ng. Gi tr ca k l

A. 4/7.B. 1/7.C. 3/14.D. 3/7. (H A 2010)Cu 44: Cho x mol Fe tan hoan toan trong dung dich cha y mol H2SO4 (ti l x : y = 2 : 5), thu c mt san phm kh duy nht va dung dich chi cha mi sunfat. S mol electron do lng Fe trn nhng khi bi hoa tan la

A. 3xB. yC. 2xD. 2y (H A 2010)

Cu 45: Cho cc phn ng:

(a) Sn + HCl (long)

(b) FeS + H2SO4 (long)

(c) MnO2 + HCl (c)

(d) Cu + H2SO4 (c)

(e) Al + H2SO4 (long)

(g) FeSO4 + KMnO4 + H2SO4

S phn ng m H+ ca axit ng vai tr oxi ha l:

A. 3B. 6C. 2D. 5(H khi B 2011)

- Tc phn ng

Cu 46: Cho cht xc tc MnO2 vo 100 ml dung dch H2O2, sau 60 giy thu c 33,6 ml kh O2 ( ktc). Tc trung bnh ca phn ng (tnh theo H2O2) trong 60 giy trn l A. 5, 0.104 mol/(l.s). B. 5, 0.105 mol/(l.s). C. , 0.103 mol/(l.s). D. 2, 5.104 mol/(l.s).

thi TSHC khi B 2009

Cu 47: Cho phng trnh ha hc ca phn ng tng hp amoniac

Khi tng nng ca hiro ln 2 ln, tc phn ng thun:

A. tng ln 8 ln.B. tng ln 2 ln.C. tng ln 6 ln.D. gim i 2 ln. thi TSC 2007

Cu 48: Cho phn ng: Br2 + HCOOH 2HBr + CO2. Nng ban u ca Br2 l a mol/lt, sau 50 giy nng Br2 cn li l 0,01 mol/lt. Tc trung bnh ca phn ng trn tnh theo Br2 l 4.10-5 mol/(l.s). Gi tr ca a l

A. 0,018.B. 0,016.C. 0,014.D. 0,012. (TSC 2010)

- Hng s cn bng, Chuyn dch CB

Cu 49: Mt bnh phn ng c dung tch khng i, cha hn hp kh N2 v H2 vi nng tng ng l 0,3M v 0,7M. Sau khi phn ng tng hp NH3 t trng thi cn bng t oC, H2 chim 50% th tch hn hp thu c. Hng s cn bng KC t oC ca phn ng c gi tr lA. 2,500.B. 3,125.C. 0,609.D. 0,500. thi TSHC khi A 2009

Cu 50: Cho cc cn bng sau:

nhit xc nh, nu KC ca cn bng (1) bng 64 th KC bng 0,125 l ca cn bng

A. (4).B. (2).C. (3).D. (5). thi TSC 2009

Cho cn bng ha hc: 2SO2 (k) + O2 (k) 2SO3 (k); phn ng thun l phn ng ta nhit. Pht biu ng l:A. Cn bng chuyn dch theo chiu thun khi tng nhit .

B. Cn bng chuyn dch theo chiu nghch khi gim nng O2.

C. Cn bng chuyn dch theo chiu thun khi gim p sut h phn ng.

D. Cn bng chuyn dch theo chiu nghch khi gim nng SO3. thi TSHC khi A 2008

Cu 51: Cho cn bng (trong bnh kn) sau:

CO (k) + H2O (k) CO2 (k) + H2 (k) H < 0

Trong cc yu t: (1) tng nhit ; (2) thm mt lng hi nc; (3) thm mt lng H2; (4) tng p sut chung ca h; (5) dng cht xc tc.

Dy gm cc yu t u lm thay i cn bng ca h l:

A. (1), (4), (5).B. (1), (2), (3).C. (2), (3), (4).D. (1), (2), (4). thi TSC 2009

Cu 52: Cho cn bng ho hc: N2 (k) + 3H2 (k) 2NH3 (k); phn ng thun l phn ng to nhit. Cn bng ho hc khng b chuyn dch khiA. thay i nng N2.B. thm cht xc tc Fe.

C. thay i nhit .

D. thay i p sut ca h. thi TSHC khi B 2008

Cu 53: Cho cc cn bng ho hc:N2 (k) + 3H2 (k) 2NH3 (k)(1)H2 (k) + I2 (k) 2HI (k)(2)2SO2 (k) + O2 (k) 2SO3 (k)(3)2NO2 (k) N2O4 (k)(4)Khi thay i p sut nhng cn bng ha hc b chuyn dch l:

A. (1), (2), (3).B. (2), (3), (4).C. (1), (3), (4).D. (1), (2), (4). thi TSC 2008

Cu 54: Cho cc cn bng sau:(1) 2SO2(k) + O2(k) 2SO3(k)

(2) N2 (k) + 3H2 (k) 2NH3 (k)

(3) CO2(k) + H2(k) CO(k) + H2O(k)

(4) 2HI (k) H2 (k) + I2 (k)

Khi thay i p sut, nhm gm cc cn bng ho hc u khng b chuyn dch l

A. (1) v (2).B. (1) v (3).C. (3) v (4).D. (2) v (4). thi TSC 2009

Cu 55: Cho cn bng sau trong bnh kn: 2NO2 N2O4

(mu nu )

(khng mu)

Bit khi h nhit ca bnh th mu nu nht dn. Phn ng thun c:

A. H < 0, phn ng to nhit B. H > 0, phn ng to nhit

C. H < 0, phn ng thu nhit D. H > 0, phn ng thu nhit thi TSHC khi A 2009

Hng s cn bng ca phn ng xc nh ch ph thuc voA. nhit .B. p sut.C. cht xc tc.D. nng . thi TSC 2008

Cu 56: Cho cn bng ho hc: PCl5 (k) ( PCl3 (k) + Cl2 (k);

Cn bng chuyn dch theo chiu thun khi

A. tng p sut ca h phn ng.B. thm Cl2 vo h phn ng.

C. thm PCl3 vo h phn ng.D. tng nhit ca h phn ng. (TSC 2010)

Cu 57: Cho cn bng ho hc : N2 (k) +3H2 (k) ( 2NH3 (k)

Cn bng trn chuyn dch theo chiu thun khi:

A. tng p sut ca h phn ngB. tng nhit ca h phn ng

C. gim p sut ca h phn ngD. thm cht xc tc vo h phn ng (C 2011)Cu 58: Cho phn ng: H2 (k) + I2 (k) 2HI (k)

nhit 4300C, hng s cn bng KC ca phn ng trn bng 53,96. un nng mt bnh kn dung tch khng i 10 lt cha 4,0 gam H2 v 406,4 gam I2. Khi h phn ng t trng thi cn bng 4300C, nng ca HI l

A. 0,275M.B. 0,320M.

C. 0,225M.

D. 0,151M. (C 2011)Cu 59: Cho cn bng 2SO2 (k) + O2 (k) 2SO3 (k). Khi tng nhit thi ti khi cua hn hp khi so vi H2 giam i. Phat biu ung khi noi v cn bng nay la :

A. Phan ng nghich toa nhit, cn bng dich chuyn theo chiu thun khi tng nhit .

B. Phan ng thun toa nhit, cn bng dich chuyn theo chiu nghich khi tng nhit .

C. Phan ng nghich thu nhit, cn bng dich chuyn theo chiu thun khi tng nhit .

D. Phan ng thun thu nhit, cn bng dich chuyn theo chiu nghich khi tng nhit . (H A 2010)

Cu 60: Xt cn bng: N2O4 (k) 2NO2 (k) 250C. Khi chuyn dch sang mt trng thi cn bng mi nu nng ca N2O4 tng ln 9 ln th nng ca NO2

A. tng 9 ln.B. tng 3 ln.C. tng 4,5 ln.D. gim 3 ln. (H A 2010)

Cu 61: Cho cac cn bng sau

(I) 2HI (k) H2 (k) + I2 (k) ;

(II) CaCO3 (r) CaO (r) + CO2 (k) ;

(III) FeO (r) + CO (k) Fe (r) + CO2 (k) ;

(IV) 2SO2 (k) + O2 (k) 2SO3 (k)

Khi giam ap sut cua h, s cn bng bi chuyn dich theo chiu nghich la

A. 4

B. 3

C. 2

D. 1 (H B 2010)Cu 62: Cho cn bng ha hc: H2 (k) + I2 (k) 2HI (k) ; (H > 0. Cn bng khng b chuyn dch khi

A. gim p sut chung ca h. B. gim nng HI.

C. tng nhit ca h. D. tng nng H2. (H khi A 2011)

Cu 63: Cho cn bng ha hc sau: 2SO2 (k) + O2 (k) 2SO3 (k) ; (H < 0

Cho cc bin php : (1) tng nhit , (2) tng p sut chung ca h phn ng, (3) h nhit , (4) dng thm cht xc tc V2O5, (5) gim nng SO3, (6) gim p sut chung ca h phn ng. Nhng bin php no lm cn bng trn chuyn dch theo chiu thun?

A. (2), (3), (4), (6)B. (1), (2), (4)C. (1), (2), (4), (5)D. (2), (3), (5) (H khi B 2011)

Cu 64: Cho 5,6 gam CO v 5,4 gam H2O vo mt bnh kn dung tch khng i 10 lt. Nung nng bnh mt thi gian 8300C h t n trng thi cn bng: CO (k) + H2O (k) (CO2 (k) + H2 (k) (hng s cn bng Kc = 1). Nng cn bng ca CO, H2O ln lt l

A. 0,018M v 0,008 M

B. 0,012M v 0,024M

C. 0,08M v 0,18M

D. 0,008M v 0,018M(H khi B 2011)3. S in li: 2 + 0,5

- pH, , Ka, Kb

Cu 65: Dung dch HCl v dung dch CH3COOH c cng nng mol/l, pH ca hai dung dch tng ng l x v y. Quan h gia x v y l (gi thit, c 100 phn t CH3COOH th c 1 phn t in li)A. y = 100x.B. y = 2x.C. y = x - 2.D. y = x + 2. thi TSHC khi A 2007

Cu 66: Cho dung dch X cha hn hp gm CH3COOH 0,1M v CH3COONa 0,1M. Bit 25 oC, Ka ca CH3COOH l 1,75.10-5 v b qua s phn li ca nc. Gi tr pH ca dung dch X 25 oC lA. 1,00.B. 4,24.C. 2,88.D. 4,76. thi TSHC khi B 2009

Cu 67: Dung dch X gm CH3COOH 1M (Ka = 1,75.10-5) v HCl 0,001M . Gi tr pH ca dung dch X l:

A. 2,43 B. 2,33 C. 1,77

Cu 68: Cho 1,82 gam hn hp bt X gm Cu v Ag (t l s mol tng ng 4 : 1) vo 30 ml dung dch gm H2SO4 0,5M v HNO3 2M, sau khi cc phn ng xy ra hon ton, thu c a mol kh NO (sn phm kh duy nht ca N+5). Trn a mol NO trn vi 0,1 mol O2 thu c hn hp kh Y. Cho ton b Y tc dng vi H2O, thu c 150 ml dung dch c pH = z. Gi tr ca z l:

A. 1B. 3C. 2D. 4(H khi B 2011)

- Vai tr, mi trng dung dch mui, tn ti cc ion

Cu 69: Dy gm cc ion cng tn ti trong mt dung dch l:

A. Al3+, PO43, Cl, Ba2+.

B. Na+, K+, OH, HCO3.

C. K+, Ba2+, OH, Cl.

D. Ca2+, Cl, Na+, CO32. (TSC 2010)

Cu 70: Dung dch no sau y c pH > 7?

A. Dung dch Al2(SO4)3.

B. Dung dch CH3COONa.

C. Dung dch NaCl.

D. Dung dch NH4Cl. (TSC 2010)

Cu 71: Cho a lt dung dch KOH c pH = 12,0 vo 8,00 lt dung dch HCl c pH = 3,0 thu c dung dch Y c pH = 11,0. Gi tr ca a l:

A. 0,12 B. 1,60C. 1,78D. 0,80 (C 2011)Cu 72 : Dung dich X co cha: 0,07 mol Na+; 0,02 mol va x mol OH-. Dung dich Y co cha va y mol H+; tng s mol va la 0,04. Trn X va Y c 100 ml dung dich Z. Dung dich Z co pH (bo qua s in li cua H2O) la

A. 1B. 2C. 12D. 13 (H A 2010)

Cu 73: Cho dy cc cht: KAl(SO4)2.12H2O, C2H5OH, C12H22O11 (saccaroz), CH3COOH, Ca(OH)2, CH3COONH4. S cht in li lA. 2.

B. 4.

C. 5.

D. 3. thi TSHC khi B 2008

Cu 74: Cho dy cc cht: Ca(HCO3)2, NH4Cl, (NH4)2CO3, ZnSO4, Al(OH)3, Zn(OH)2. S cht trong dy c tnh cht lng tnh lA. 3.

B. 5.

C. 2.

D. 4. thi TSHC khi A 2007

Cu 75: Cho dy cc cht: Cr(OH)3, Al2(SO4)3, Mg(OH)2, Zn(OH)2, MgO, CrO3. S cht trong dyc tnh cht lng tnh l A. 5.

B. 2.

C. 3.

D. 4. thi TSC 2008

Cu 76: Cc hp cht trong dy cht no di y u c tnh lng tnh? A. Cr(OH)3, Zn(OH)2, Pb(OH)2` B. Cr(OH)3, Zn(OH)2, Mg(OH)2

C. Cr(OH)3, Pb(OH)2, Mg(OH)2 D. Cr(OH)3, Fe(OH)2, Mg(OH)2 thi TSC 2007

Cu 77: Cho cc cht: Al, Al2O3, Al2(SO4)3, Zn(OH)2, NaHS, K2SO3, (NH4)2CO3. S cht u phn ng c vi dung dch HCl, dung dch NaOH lA. 6.

B. 4.

C. 5.

D. 7. thi TSHC khi A 2008

Cu 78: Dy gm cc cht va tan trong dung dch HCl, va tan trong dung dch NaOH l:A. NaHCO3, MgO, Ca(HCO3)2.B. NaHCO3, ZnO, Mg(OH)2.

C. NaHCO3, Ca(HCO3)2, Al2O3.

D. Mg(OH)2, Al2O3, Ca(HCO3)2. thi TSC 2009

Cu 79: Trong s cc dung dch: Na2CO3, KCl, CH3COONa, NH4Cl, NaHSO4, C6H5ONa, nhng dung dch c pH > 7 lA. Na2CO3, C6H5ONa, CH3COONa.B. Na2CO3, NH4Cl, KCl.C. NH4Cl, CH3COONa, NaHSO4.D. KCl, C6H5ONa, CH3COONa. thi TSC 2007

Cu 80: Cho cc dung dch c cng nng : Na2CO3 (1), H2SO4 (2), HCl (3), KNO3 (4). Gi tr pH ca cc dung dch c sp xp theo chiu tng t tri sang phi l:A. (3), (2), (4), (1).B. (4), (1), (2), (3).C. (1), (2), (3), (4).D. (2), (3), (4), (1). thi TSC 2008

Cu 81: t chay hoan toan m gam FeS2 bng mt lng O2 va u, thu c khi X. Hp thu ht X vao 1 lit dd cha Ba(OH)2 0,15M va KOH 0,1M, thu c dd Y va 21,7 gam kt tua. Cho Y vao dd NaOH, thy xut hin thm kt tua. Gia tri cua m la

A. 23,2

B. 12,6

C. 18,0

D. 24,0 (H B 2010)

Cu 82: dd axit fomic 0,007M c pH = 3. Kt lun no sau y khng ng?

A. Khi pha long 10 ln dd trn th thu c dd c pH = 4.

B. in li ca axit fomic s gim khi thm dd HCl.

C. Khi pha lang dd trn th in li ca axit fomic tng.

D. in li ca axit fomic trong dd trn l 14,29%. (H B 2010)

- Hn hp axit td hn hp baz. Pt ion thu gn. Bt in tchCu 83: Cho 4 phn ng:(1) Fe + 2HCl FeCl2 + H2(2) 2NaOH + (NH4)2SO4 Na2SO4 + 2NH3 + 2H2O(3) BaCl2 + Na2CO3 BaCO3 + 2NaCl(4) 2NH3 + 2H2O + FeSO4 Fe(OH)2 + (NH4)2SO4Cc phn ng thuc loi phn ng axit - baz l

A. (1), (2).B. (2), (4).C. (3), (4).D. (2), (3). thi TSHC khi B 2007

Cu 84: Cho cc phn ng ha hc sau:(1) (NH4)2SO4 + BaCl2 (2) CuSO4 + Ba(NO3)2(3) Na2SO4 + BaCl2 (4) H2SO4 + BaSO3(5) (NH4)2SO4 + Ba(OH)2 (6) Fe2(SO4)3 + Ba(NO3)2 Cc phn ng u c cng mt phng trnh ion rt gn l:

A. (1), (2), (3), (6).B. (1), (3), (5), (6).C. (2), (3), (4), (6).D. (3), (4), (5), (6). thi TSHC khi B 2009

Cu 85: Trn ln V ml dung dch NaOH 0,01M vi V ml dung dch HCl 0,03 M c 2V ml dung dch Y. Dung dch Y c pH lA. 2.

B. 3.

C. 1.

D. 4. thi TSHC khi A 2008

Cu 86: Trn 100 ml dung dch (gm Ba(OH)2 0,1M v NaOH 0,1M) vi 400 ml dung dch (gm H2SO4 0,0375M v HCl 0,0125M), thu c dung dch X. Gi tr pH ca dung dch X lA. 1.

B. 2.

C. 7.

D. 6. thi TSHC khi B 2007

Cu 87: Trn 100 ml dung dch hn hp gm H2SO4 0,05M v HCl 0,1M vi 100 ml dung dch hn hp gm NaOH 0,2M v Ba(OH)2 0,1M, thu c dung dch X. Dung dch X c pH lA. 13,0.

B. 1,2.

C. 1,0.

D. 12,8. thi TSHC khi B 2009

Cu 88: Trn 100 ml dung dch c pH = 1 gm HCl v HNO3 vi 100 ml dung dch NaOH nng a (mol/l) thu c 200 ml dung dch c pH = 12. Gi tr ca a lA. 0,30.

B. 0,12.

C. 0,15.

D. 0,03. thi TSHC khi B 2008

Cu 89: Cho dung dch cha 0,1 mol (NH4)2CO3 tc dng vi dung dch cha 34,2 gam Ba(OH)2. Sau phn ng thu c m gam kt ta. Gi tr ca m lA. 19,7.

B. 39,4.

C. 17,1.D. 15,5. thi TSC 2009

Cu 90: Mt dung dch cha 0,02 mol Cu2+, 0,03 mol K+, x mol Cl- v y mol . Tng khi lng cc mui tan c trong dung dch l 5,435 gam. Gi tr ca x v y ln lt l:A. 0,01 v 0,03.

B. 0,05 v 0,01.

C. 0,03 v 0,02.

D. 0,02 v 0,05. thi TSC 2007Cu 91: Ho tan hon ton hn hp gm 0,12 mol FeS2 v a mol Cu2S vo axit HNO3 (va ), thu c dung dch X (ch cha hai mui sunfat) v kh duy nht NO. Gi tr ca a lA. 0,04. B. 0,075. C. 0,12. D. 0,06. thi TSHC khi A 2007

Cu 92: Hn hp X cha Na2O, NH4Cl, NaHCO3 v BaCl2 c s mol mi cht u bng nhau. Cho hn hp X vo H2O (d), un nng, dung dch thu c chaA. NaCl.B. NaCl, NaOH, BaCl2.C. NaCl, NaOH.

D. NaCl, NaHCO3, NH4Cl, BaCl2. thi TSHC khi B 2007

Cu 93: Trong cc dung dch: HNO3, NaCl, Na2SO4, Ca(OH)2, KHSO4, Mg(NO3)2, dy gm cc cht u tc dng c vi dung dch Ba(HCO3)2 l:A. HNO3, Ca(OH)2, KHSO4, Mg(NO3)2.B. NaCl, Na2SO4, Ca(OH)2.C. HNO3, Ca(OH)2, KHSO4, Na2SO4.D. HNO3, NaCl, Na2SO4. thi TSHC khi B 2007

Cu 94: Dung dch X cha cc ion: Fe3+, SO42-, NH4+, Cl-. Chia dung dch X thnh hai phn bng nhau:- Phn mt tc dng vi lng d dung dch NaOH, un nng thu c 0,672 lt kh ( ktc) v

1,07 gam kt ta;- Phn hai tc dng vi lng d dung dch BaCl2, thu c 4,66 gam kt ta.

Tng khi lng cc mui khan thu c khi c cn dung dch X l (qu trnh c cn ch c nc bay hi)A. 3,73 gam.

B. 7,04 gam.

C. 7,46 gam.

D. 3,52 gam. thi TSC 2008

Cu 95: Khi ha tan hiroxit kim loi M(OH)2 bng mt lng va dung dch H2SO4 20% thu c dung dch mui trung ho c nng 27,21%. Kim loi M l A. Cu.B. Zn.C. Mg.D. Fe. thi TSC 2007

Cu 96: Cho dung dich X gm: 0,007 mol Na+; 0,003 mol Ca2+; 0,006 mol Cl-; 0,006 va 0,001 mol . loai bo ht Ca2+ trong X cn mt lng va u dung dich cha a gam Ca(OH)2 Gia tri cua a la

A. 0,222B. 0,120C. 0,444D. 0,180 (H A 2010)

Cu 97: dd X cha cac ion: Ca2+, Na+, va , trong o s mol cua ion la 0,1. Cho 1/2 dd X phan ng vi dd NaOH (d), thu c 2 gam kt tua. Cho 1/2 dd X con lai phan ng vi dd Ca(OH)2 (d), thu c 3 gam kt tua. Mt khac, nu un si n can dd X thi thu c m gam cht rn khan. Gia tri cua m la

A. 9,21

B. 9,26

C. 8,79

D. 7,47 (H B 2010)B. HA HC V C

4. Phi kim (halogen oxi, lu hunh cacbon, silic nit, photpho): 2

- iu ch, nhn bit, tnh cht ha hc

Cu 98 : Hn hp khi X gm N2 va H2 co ti khi so vi He bng 1,8. un nong X mt thi gian trong binh kin (co bt Fe lam xuc tac), thu c hn hp khi Y co ti khi so vi He bng 2. Hiu sut cua phan ng tng hp NH3 la

A. 50%B. 36%C. 40%D. 25%

Cu 99: Cht c dng ty trng giy v bt giy trong cng nghip l

A. CO2.B. SO2.C. N2O.D. NO2. (H A 2010)

Cu 100: Cho 0,448 lt kh NH3 (ktc) i qua ng s ng 16 gam CuO nung nng, thu c cht rn X (gi s phn ng xy ra hon ton). Phn trm khi lng ca Cu trong X l

A. 12,37%.B. 87,63%.C. 14,12%.D. 85,88%. (H A 2010)

Cu 101: Trong phng th nghim, ngi ta thng iu ch clo bng cchA. in phn nng chy NaCl.

B. cho dung dch HCl c tc dng vi MnO2, un nng.

C. in phn dung dch NaCl c mng ngn.

D. cho F2 y Cl2 ra khi dung dch NaCl. thi TSHC khi A 2007

Cu 102: Trong phng th nghim, ngi ta iu ch oxi bng cchA. in phn nc. B. nhit phn Cu(NO3)2.

C. nhit phn KClO3 c xc tc MnO2. D. chng ct phn on khng kh lng. thi TSHC khi A 2008

Cu 103: ng dng no sau y khng phi ca ozon?A. Ty trng tinh bt, du n.B. Cha su rng.

C. iu ch oxi trong phng th nghim. D. St trng nc sinh hot. thi TSHC khi B 2009

Cu 104: Trong phng th nghim, iu ch mt lng nh kh X tinh khit, ngi ta un nng dung dch amoni nitrit bo ho. Kh X lA. NO.

B. NO2.

C. N2O.

D. N2. thi TSHC khi A 2007Cu 105: Trong phng th nghim, ngi ta thng iu ch HNO3 tA. NaNO3 v H2SO4 c.B. NaNO2 v H2SO4 c.C. NH3 v O2.

D. NaNO3 v HCl c. thi TSHC khi B 2007

Cu 106: Cho Cu v dung dch H2SO4 long tc dng vi cht X (mt loi phn bn ha hc), thy thot ra kh khng mu ha nu trong khng kh. Mt khc, khi X tc dng vi dung dch NaOH th c kh mi khai thot ra. Cht X lA. amophot.B. ure.C. natri nitrat.D. amoni nitrat. thi TSHC khi A 2008Cu 107: Phn bn no sau y lm tng chua ca t?A. KCl.

B. NH4NO3.

C. NaNO3.

D. K2CO3. thi TSHC khi B 2009

Cu 108: Thnh phn chnh ca qung photphorit lA. CaHPO4.B. Ca3(PO4)2.C. Ca(H2PO4)2.D. NH4H2PO4. thi TSHC khi B 2008

Cu 109: Pht biu no sau y l ng?A. Phn ln cung cp nit ho hp cho cy di dng ion nitrat (NO3-) v ion amoni (NH4+).B. Amophot l hn hp cc mui (NH4)2HPO4 v KNO3.C. Phn hn hp cha nit, photpho, kali c gi chung l phn NPK.

D. Phn ur c cng thc l (NH4)2CO3. thi TSHC khi A 2009Cu 110: Phn bn nitrophotka (NPK) l hn hp caA. (NH4)2HPO4 v KNO3.B. NH4H2PO4 v KNO3.

C. (NH4)3PO4 v KNO3.

D. (NH4)2HPO4 v NaNO3. thi TSC 2009Cu 111: Cho cc phn ng sau:(1)

(2)

(3)

(4)

(5)

(6) Cc phn ng u to kh N2 l:

A. (1), (3), (4).B. (1), (2), (5).C. (2), (4), (6).D. (3), (5), (6). thi TSHC khi A 2008

Cu 112: Cho cc phn ng sau:4HCl + MnO2 MnCl2 + Cl2 + 2H2O.

2HCl + Fe FeCl2 + H2.14HCl + K2Cr2O7 2KCl + 2CrCl3 + 3Cl2 + 7H2O.6HCl + 2Al 2AlCl3 + 3H2.16HCl + 2KMnO4 2KCl + 2MnCl2 + 5Cl2 + 8H2O.S phn ng trong HCl th hin tnh oxi ha lA. 3.B. 4.C. 2.D. 1. thi TSHC khi A 2008

Cu 113: Cho cc phn ng sau:

(a) 4HCl + PbO2 PbCl2 + Cl2 + 2H2O.

(b) HCl + NH4HCO3 NH4Cl + CO2 + H2O.(c) 2HCl + 2HNO3 2NO2 + Cl2 + 2H2O.(d) 2HCl + Zn ZnCl2 + H2.S phn ng trong HCl th hin tnh kh lA. 2.B. 3.C. 1.D. 4. thi TSHC khi B 2009

Cu 114: Cho cc phn ng :(1) O3 + dung dch KI (

(2) F2 + H2O

(3) MnO2 + HCl c

(4) Cl2 + dung dch H2S (Cc phn ng to ra n cht l :

A. (1), (2), (3)

B. (1), (3), (4)

C. (2), (3), (4)

D. (1), (2), (4)

thi TSHC khi B 2008

Cu 115: Phn ng nhit phn khng ng l :A. 2KNO3 2KNO2 + O2

B. NH4NO2 N2 + 2H2O

C. NH4Cl NH3 + HCl

D. NaHCO3 NaOH + CO2 thi TSHC khi B 2008Cu 116: Trng hp khng xy ra phn ng ha hc lA. 3O2 + 2H2S 2SO2 + 2H2O

B. FeCl2 + H2S FeS + 2HCl

C. O3 + 2KI + H2O O2 + 2KOH + I2

D. Cl2 + 2NaOH NaCl + NaClO + H2O

thi TSC 2008

Cu 117: Dy gm cc cht u tc dng c vi dung dch HCl long l:A. KNO3, CaCO3, Fe(OH)3.B. FeS, BaSO4, KOH.

C. AgNO3, (NH4)2CO3, CuS.D. Mg(HCO3)2, HCOONa, CuO. thi TSHC khi A 2009 Cu 118: Nu cho 1 mol mi cht: CaOCl2, KMnO4, K2Cr2O7, MnO2 ln lt phn ng vi lng d dung dch HCl c, cht to ra lng kh Cl2 nhiu nht lA. KMnO4.B. MnO2.C. CaOCl2.D. K2Cr2O7. thi TSHC khi A 2009

Cu 119: Khi nhit phn hon ton 100 gam mi cht sau: KClO3 (xc tc MnO2), KMnO4, KNO3 v AgNO3. Cht to ra lng O2 ln nht lA. KClO3.B. KMnO4.C. KNO3.D. AgNO3. thi TSHC khi B 2009

Cu 120: Cht kh X tan trong nc to ra mt dung dch lm chuyn mu qu tm thnh v c th c dng lm cht ty mu. Kh X l A. NH3.B. CO2.C. SO2.D. O3. thi TSC 2009

Cu 121: SO2 lun th hin tnh kh trong cc phn ng viA. H2S, O2, nc Br2.B. dung dch NaOH, O2, dung dch KMnO4.C. O2, nc Br2, dung dch KMnO4.D. dung dch KOH, CaO, nc Br2. thi TSC 2007

Cu 122: Mt loi phn supephotphat kp c cha 69,62% mui canxi ihirophotphat, cn li gm cc cht khng cha photpho. dinh dng ca loi phn ln ny l

A. 48,52%.

B. 42,25%.

C. 39,76%.

D. 45,75%. (H B 2010)

Cu 123: Cho s chuyn hoa :

Cac cht X, Y, Z ln lt la :

A. K3PO4, K2HPO4, KH2PO4

B. KH2PO4, K2HPO4, K3PO4

C. K3PO4, KH2PO4, K2HPO4

D. KH2PO4, K3PO4, K2HPO4 (H B 2010)

Cu 124: Cho hi nc i qua than nng , thu c 15,68 lt hn hp kh X (ktc) gm CO, CO2 v H2. Cho ton b X tc dng ht vi CuO (d) nung nng, thu c hn hp cht rn Y. Ha tan ton b Y bng dung dch HNO3 (long, d) c 8,96 lt NO (sn phm kh duy nht, ktc). Phn trm th tch kh CO trong X l:

A. 18,42%B. 28,57%C. 14,28%D. 57,15%(H khi B 2011)

- Halogen, lu hunh

Cu 125: Pht biu no sau y ng?

A. Dung dch NaF phn ng vi dung dch AgNO3 sinh ra AgF kt ta.

B. Iot c bn knh nguyn t ln hn brom.

C. Flo c tnh oxi ho yu hn clo.

D. Axit HBr c tnh axit yu hn axit HCl. (TSC 2010)

Cu 126: Cho 0,015 mol mt loi hp cht oleum vo nc thu c 200 ml dung dch X. trung ho 100 ml dung dch X cn dng 200 ml dung dch NaOH 0,15M. Phn trm v khi lng ca nguyn t lu hunh trong oleum trn l

A. 35,95%.B. 37,86%.C. 32,65%.D. 23,97%.(TSC 2010)Cu 127: Cho 3,16 gam KMnO4 tc dng vi dung dch HCl (d), sau khi phn ng xy ra hon ton th s mol HCl b oxi ho l

A. 0,02B. 0,16C. 0,10D. 0,05 (C 2011)Cu 128: Kh no sau y khng b oxi ha bi nuc Gia-ven.

A. HCHO.

B. H2S.

C. CO2.

D. SO2. (C 2011)Cu 129: Pht biu no sau y khng ng?

A. Mui AgI khng tan trong nc, mui AgF tan trong nc

B. Flo c tnh oxi ho mnh hn clo.

C. Trong cc hp cht, ngoi s oxi ho -1, flo v clo cn c s oxi ho +1, +3, +5, +7

D. Dung dch HF ho tan c SiO2 (C 2011)

Cu 130: Cho cc cht : KBr, S, SiO2, P, Na3PO4, FeO, Cu v Fe2O3. Trong cc cht trn, s cht c th oxi ho bi dung dch axit H2SO4 c nng l:

A. 4B. 5C. 7D. 6 (C 2011)Cu 131: Hn hp khi nao sau y khng tn tai nhit thng ?

A. H2 va F2B. Cl2 va O2C. H2S va N2D. CO va O2 (H A 2010)Cu 132: Pht biu khng ng l:

A. Hiro sunfua b oxi ha bi nc clo nhit thng.

B. Kim cng, than ch, fuleren l cc dng th hnh ca cacbon.

C. Tt c cc nguyn t halogen u c cc s oxi ha: -1, +1, +3, +5 v +7 trong cc hp cht.

D. Trong cng nghip, photpho c sn xut bng cch nung hn hp qung photphorit, ct v than cc 12000C trong l in. (H A 2010)

Cu 133: Trn 5,6 gam bt st vi 2,4 gam bt lu hunh ri nung nng (trong iu kin khng c khng kh), thu c hn hp rn M. Cho M tc dng vi lng d dung dch HCl, gii phng hn hp kh X v cn li mt phn khng tan G. t chy hon ton X v G cn va V lt kh O2 (ktc). Gi tr ca V lA. 2,80.B. 3,36.C. 3,08.D. 4,48. thi TSC 2008

Cu 134: Cho 13,44 lt kh clo ( ktc) i qua 2,5 lt dung dch KOH 100oC. Sau khi phn ng xy ra hon ton, thu c 37,25 gam KCl. Dung dch KOH trn c nng l A. 0,24M.B. 0,2M.C. 0,4M.D. 0,48M. thi TSHC khi B 2007

Cu 135: Cho dung dch cha 6,03 gam hn hp gm hai mui NaX v NaY (X, Y l hai nguyn t c trong t nhin, hai chu k lin tip thuc nhm VIIA, s hiu nguyn t ZX < ZY) vo dung dch AgNO3 (d), thu c 8,61 gam kt ta. Phn trm khi lng ca NaX trong hn hp ban u lA. 58,2%.B. 41,8%.C. 52,8%.D. 47,2%. thi TSHC khi B 2009

Cu 136: Pht biu no sau y l sai?

A. Bn knh nguyn t ca clo ln hn bn knh nguyn t ca flo.

B. m in ca brom ln hn m in ca iot.

C. Tnh axit ca HF mnh hn tnh axit ca HCl.

D. Tnh kh ca ion Br- ln hn tnh kh ca ion Cl-.(H khi A 2011)

Cu 137: Nhit phn 4,385 gam hn hp X gm KClO3 v KMnO4, thu c O2 v m gam cht rn gm K2MnO4, MnO2 v KCl . Ton b lng O2 tc dng ht vi cacbon nng , thu c 0,896 lt hn hp kh Y (ktc) c t khi so vi H2 l 16. Thnh phn % theo khi lng ca KMnO4 trong X l:

A. 62,76%B. 74,92%C. 72,06%D. 27,94%(H khi B 2011)

- trong H+, nhit phn ca mui nitrat

Cu 138: Khi cho Cu tc dng vi dung dch cha H2SO4 long v NaNO3, vai tr ca NaNO3 trong phn ng lA. cht oxi ho.B. mi trng.

C. cht kh.D. cht xc tc. thi TSHC khi B 2007

Cu 139: Thc hin hai th nghim:1) Cho 3,84 gam Cu phn ng vi 80 ml dung dch HNO3 1M thot ra V1 lt NO.

2) Cho 3,84 gam Cu phn ng vi 80 ml dung dch cha HNO3 1M v H2SO4 0,5 M thot ra V2 lt NO.Bit NO l sn phm kh duy nht, cc th tch kh o cng iu kin. Quan h gia V1 v V2 lA. V2 = 1,5V1.B. V2 = 2V1.C. V2 = 2,5V1.D. V2 = V1. thi TSHC khi B 2007

Cu 140: Cho 3,2 gam bt Cu tc dng vi 100 ml dung dch hn hp gm HNO3 0,8M v H2SO4 0,2M. Sau khi cc phn ng xy ra hon ton, sinh ra V lt kh NO (sn phm kh duy nht, ktc). Gi tr ca V lA. 0,746.B. 0,672.C. 0,448.D. 1,792. thi TSHC khi A 2008

Cu 141: Cho m gam bt Fe vo 800 ml dung dch hn hp gm Cu(NO3)2 0,2M v H2SO4 0,25M. Sau khi cc phn ng xy ra hon ton, thu c 0,6m gam hn hp bt kim loi v V lt kh NO (sn phm kh duy nht, ktc). Gi tr ca m v V ln lt lA. 10,8 v 4,48.B. 10,8 v 2,24.C. 17,8 v 2,24.D. 17,8 v 4,48. thi TSHC khi B 2009

Cu 142: Cho hn hp gm 1,12 gam Fe v 1,92 gam Cu vo 400 ml dung dch cha hn hp gm H2SO4 0,5M v NaNO3 0,2M. Sau khi cc phn ng xy ra hon ton, thu c dung dch X v kh NO (sn phm kh duy nht). Cho V ml dung dch NaOH 1M vo dung dch X th lng kt ta thu c l ln nht. Gi tr ti thiu ca V lA. 360.B. 240.C. 400.D. 120. thi TSHC khi A 2009

Cu 143: Nung 6,58 gam Cu(NO3)2 trong bnh kn khng cha khng kh, sau mt thi gian thu c 4,96 gam cht rn v hn hp kh X. Hp th hon ton X vo nc c 300 ml dung dch Y. Dung dch Y c pH bngA. 4.B. 2.C. 1.D. 3. thi TSHC khi A 2009

Cu 144: Nhit phn hon ton 34,65 gam hn hp gm KNO3 v Cu(NO3)2, thu c hn hp kh X (t khi ca X so vi kh hiro bng 18,8). Khi lng Cu(NO3)2 trong hn hp ban u lA. 8,60 gam.B. 20,50 gam.C. 11,28 gam.D. 9,40 gam. thi TSC 2008

Cu 145: Sn phm ca phn ng nhit phn hon ton AgNO3 l:

A. Ag, NO2, O2.B. Ag2O, NO2, O2.C. Ag2O, NO, O2.D. Ag, NO, O2. (TSC 2010)

Cu 146: Cho a gam Fe vo 100 ml dung dch hn hp gm HNO3 0,8M v Cu(NO3)2 1M. Sau khi cc phn ng xy ra hon ton, thu c 0,92a gam hn hp kim loi v kh NO (sn phm kh duy nht ca). Gi tr ca a l

A. 11,0.B. 11,2.C. 8,4.D. 5,6. (TSC 2010)

Cu 147: Thuc th dng phn bit dung dch NH4NO3 vi dung dch (NH4)2SO4 l

A. kim loi Cu v dung dch HCl.B. dung dch NaOH v dung dch HCl.

C. ng(II) oxit v dung dch HCl.D. ng(II) oxit v dung dch NaOH. (TSC 2010)

Cu 148: nhn ra ion NO3- trong dung dch Ba(NO3)2, ngi ta un nng nh dung dch vi:

A. dung dch H2SO4 longB. kim loi Cu v dung dch Na2SO4

C. kim loi Cu v dung dch H2SO4 longD. kim loi Cu (C 2011)

Cu 149: Cho 0,3 mol bt Cu va 0,6 mol Fe(NO3)2 vao dd cha 0,9 mol H2SO4 (loang). Sau khi cac phan ng xay ra hoan toan, thu c V lit khi NO (san phm kh duy nht, ktc). Gia tri cua V la

A. 6,72

B. 8,96

C. 4,48

D. 10,08 (H B 2010)Cu 150: Cho 0,87 gam hh gm Fe, Cu v Al vo bnh ng 300 ml dd H2SO4 0,1M. Sau khi cc phn ng xy ra hon ton, thu c 0,32 gam cht rn v c 448 ml kh (ktc) thot ra. Thm tip vo bnh 0,425 gam NaNO3, khi cc phn ng kt thc th th tch kh NO (ktc, sn phm kh duy nht) to thnh v khi lng mui trong dd l

A. 0,224 lt v 3,750 gam. B. 0,112 lt v 3,750 gam.

C. 0,112 lt v 3,865 gam. D. 0,224 lt v 3,865 gam. (H khi A 2011)

Cu 151: Cho 7,68 gam Cu vo 200 ml dd gm HNO3 0,6M v H2SO4 0,5M. Sau khi cc phn ng xy ra hon ton (sn phm kh duy nht l NO), c cn cn thn ton b dd sau P th khi lng mui khan thu c l

A. 20,16 gam. B. 19,76 gam. C. 19,20 gam. D. 22,56 gam. (H khi A 2011)

Cu 152 : Hn hp X gm Fe(NO3)2, Cu(NO3)2 v AgNO3. Thnh phn % khi lng ca nit trong X l 11,864%. C th iu ch c ti a bao nhiu gam hn hp ba kim loi t 14,16 gam X?

A. 10,56 gam B. 7,68 gamC. 3,36 gamD. 6,72 gam(H khi B 2011)Cu 153: Nhit phn mt lng AgNO3 c cht rn X v hn hp kh Y. Dn ton b Y vo mt lng d H2O, thu c dung dch Z. Cho ton b X vo Z, X ch tan mt phn v thot ra kh NO (sn phm kh duy nht). Bit cc phn ng xy ra hon ton. Phn trm khi lng ca X phn ng l

A. B. 60%

C. 70%

D. 75%(H khi B 2011)- P to NH4NO3

Cu 154: Ho tan hon ton mt lng bt Zn vo mt dung dch axit X. Sau phn ng thu c dung dch Y v kh Z. Nh t t dung dch NaOH (d) vo Y, un nng thu c kh khng mu T. Axit X l

A. H2SO4 c.B. HNO3.C. H3PO4.D. H2SO4 long. thi TSC 2009

Cu 155: Ha tan hon ton 13,00 gam Zn trong dung dch HNO3 long, d thu c dung dch X v 0,448 lt kh N2 (ktc). Khi lng mui trong dung dch X l

A. 18,90 gam

B. 37,80 gam

C. 39,80 gam

D. 28,35 gam (C 2011)Cu 156: Cho 2,16 gam Mg tc dng vi dung dch HNO3 (d). Sau khi phn ng xy ra hon ton thu c 0,896 lt kh NO ( ktc) v dung dch X. Khi lng mui khan thu c khi lm bay hi dung dch X lA. 13,32 gam.B. 6,52 gam.C. 8,88 gam.D. 13,92 gam. thi TSHC khi B 2008

Cu 157: Ho tan hon ton 12,42 gam Al bng dung dch HNO3 long (d), thu c dung dch X v 1,344 lt ( ktc) hn hp kh Y gm hai kh l N2O v N2. T khi ca hn hp kh Y so vi kh H2 l 18. C cn dung dch X, thu c m gam cht rn khan. Gi tr ca m lA. 38,34.B. 34,08.C. 106,38.D. 97,98. thi TSHC khi A 2009

5. i cng v kim loi: 2

Dy th in cc chun: 1

- Tc vt l, ha hc, dy th in cc chun

Cu 158: Dy cc ion xp theo chiu gim dn tnh oxi ho l (bit trong dy in ha, cp Fe3+/Fe2+ ng trc cp Ag+/Ag):A. Ag+, Cu2+, Fe3+, Fe2+B. Fe3+, Fe2+, Cu2+, Ag+

C. Ag+, Fe3+, Cu2+, Fe2+

D. Fe3+, Ag+, Cu2+, Fe2+ thi TSHC khi A 2007

Cu 159: Cho cc phn ng xy ra sau y: (1)AgNO3 + Fe(NO3)2 Fe(NO3)3 + Ag(2)Mn + 2HCl MnCl2 + H2Dy cc ion c sp xp theo chiu tng dn tnh oxi ho lA. Ag+, Mn2+, H+, Fe3+.B. Mn2+, H+, Ag+, Fe3+.C. Ag+, Fe3+, H+, Mn2+.

D. Mn2+, H+, Fe3+, Ag+. thi TSHC khi B 2007

Cu 160: Cho cc ion kim loi: Zn2+, Sn2+, Ni2+, Fe2+, Pb2+. Th t tnh oxi ho gim dn lA. Pb2+ > Sn2+ > Fe2+> Ni2+ > Zn2+.B. Pb2+ > Sn2+ > Ni2+ > Fe2+> Zn2+.C. Sn2+ > Ni2+ > Zn2+> Pb2+ > Fe2+.

D. Zn2+>Sn2+ > Ni2+ > Fe2+> Pb2+. thi TSC 2007Cu 161: Cho phn ng ha hc: Fe + CuSO4 FeSO4 + Cu.Trong phn ng trn xy raA. s kh Fe2+ v s oxi ha Cu.B. s kh Fe2+ v s kh Cu2+.C. s oxi ha Fe v s oxi ha Cu.

D. s oxi ha Fe v s kh Cu2+. thi TSC 2008

Cu 162: Hai kim loi X, Y v cc dung dch mui clorua ca chng c cc phn ng ha hc sau:X + 2YCl3 XCl2 + 2YCl2;

Y + XCl2 YCl2 + X.Pht biu ng l:A. Ion Y2+ c tnh oxi ha mnh hn ion X2+.B. Kim loi X kh c ion Y2+.

C. Kim loi X c tnh kh mnh hn kim loi Y.D. Ion Y3+ c tnh oxi ha mnh hn ion X2+. thi TSC 2008Cu 163: Th t mt s cp oxi ho - kh trong dy in ho nh sau: Fe2+Fe; Cu2+/Cu; Fe3+/Fe2+.Cp cht khng phn ng vi nhau l

A. Cu v dung dch FeCl3.B. dung dch FeCl2 v dung dch CuCl2.

C. Fe v dung dch CuCl2.

D. Fe v dung dch FeCl3. thi TSC 2007

Cu 164: Cp cht khng xy ra phn ng ho hc lA. Cu + dung dch FeCl3.B. Fe + dung dch HCl.

C. Fe + dung dch FeCl3.

D. Cu + dung dch FeCl2. thi TSC 2008

Cu 165: kh ion Fe3+ trong dung dch thnh ion Fe2+ c th dng mt lng dA. kim loi Cu.B. kim loi Ag.C. kim loi Ba.D. kim loi Mg. thi TSC 2007

Cu 166: Mnh khng ng l:A. Fe2+ oxi ho c Cu.B. Fe kh c Cu2+ trong dung dch.C. Fe3+ c tnh oxi ha mnh hn Cu2+.D. Tnh oxi ha ca cc ion tng theo th t: Fe2+, H+, Cu2+, Ag+. thi TSHC khi A 2007

Cu 167: kh ion Cu2+ trong dung dch CuSO4 c th dng kim loiA. K.

B. Na.

C. Fe.

D. Ba. thi TSC 2007Cu 168: X l kim loi phn ng c vi dung dch H2SO4 long, Y l kim loi tc dng c vi dung dch Fe(NO3)3. Hai kim loi X, Y ln lt l (bit th t trong dy th in ho: Fe3+/Fe2+ ng trc Ag+/Ag)A. Ag, Mg.B. Cu, FeC. Fe, Cu.D. Mg, Ag. thi TSHC khi A 2008

Cu 169: Th t mt s cp oxi ho - kh trong dy in ho nh sau: Mg2+/Mg; Fe2+/Fe; Cu2+/Cu; Fe3+/Fe2+; Ag+/Ag. Dy ch gm cc cht, ion tc dng c vi ion Fe3+ trong dung dch l:A. Fe, Cu, Ag+.B. Mg, Fe2+, Ag.C. Mg, Cu, Cu2+.D. Mg, Fe, Cu. thi TSC 2009

Cu 170: Dy no sau y ch gm cc cht va tc dng c vi dung dch HCl, va tc dng c vi dung dch AgNO3?A. Fe, Ni, Sn.

B. Al, Fe, CuO.

C. Zn, Cu, Mg.

D. Hg, Na, Ca. thi TSC 2009Cu 171: Kim loi M phn ng c vi: dung dch HCl, dung dch Cu(NO3)2, dung dch HNO3 (c, ngui). Kim loi M lA. Al.

B. Zn.

C. Fe.

D. Ag. thi TSC 2008

Cu 172: Cho bit th t t tri sang phi ca cc cp oxi ho - kh trong dy in ho (dy th in cc chun) nh sau: Zn2+/Zn; Fe2+/Fe; Cu2+/Cu; Fe3+/Fe2+; Ag+/Ag.

Cc kim loi v ion u phn ng c vi ion Fe2+ trong dung dch l:

A. Zn, Ag+.B. Zn, Cu2+.C. Ag, Cu2+.D. Ag, Fe3+. (TSC 2010)

Cu 173: Dy gm cc kim loi u tc dng c vi dung dch HCl nhng khng tc dng vi dung dch HNO3 c , ngui l:

A. Fe, Al, CrB. Cu, Fe, AlC. Fe, Mg, AlD. Cu, Pb, Ag (C 2011)

Cu 174: Dy gm cc ion u oxi ha c kim loi Fe l

A. Cr2+, Au3+, Fe3+. B. Fe3+, Cu2+, Ag+. C. Zn2+, Cu2+, Ag+. D. Cr2+, Cu2+, Ag+. (C 2011)Cu 175: Cho cac cp cht vi ti l s mol tng ng nh sau :

(a) Fe3O4 va Cu (1:1)

(b) Sn va Zn (2:1)

(c) Zn va Cu (1:1)

(d) Fe2(SO4)3 va Cu (1:1)(e) FeCl2 va Cu (2:1)

(g) FeCl3 va Cu (1:1)

S cp cht tan hoan toan trong mt lng d dung dich HCl loang nong la

A. 4

B. 2

C. 3

D. 5 (H B 2010)Cu 176: Phat biu nao sau y khng ung ?

A. Trong mi trng kim, mui Cr(III) co tinh kh va bi cac cht oxi hoa manh chuyn thanh mui Cr(VI).

B. Do Pb2+/Pb ng trc 2H+/H2 trong day in hoa nn Pb d dang phan ng vi dd HCl loang ngui, giai phong khi H2.

C. CuO nung nong khi tac dung vi NH3 hoc CO, u thu c Cu

D. Ag khng phan ng vi dd H2SO4 loang nhng phan ng vi dd H2SO4 c nong. (H B 2010)

Cu 177: Cho cc phn ng sau:

Fe + 2Fe(NO3)3 ( 3Fe(NO3)2

AgNO3 + Fe(NO3)2 ( Fe(NO3)3 + Ag .

Dy sp xp theo th t tng dn tnh oxi ha cc ion kim loi l:

A. Ag+, Fe2+, Fe3+ B. Fe2+, Fe3+, Ag+ C. Fe2+, Ag+, Fe3+ D. Ag+, Fe3+, Fe2+(H khi A 2011)- n mn in ha, pin in

Cu 178: Cho cc cp kim loi nguyn cht tip xc trc tip vi nhau: Fe v Pb; Fe v Zn; Fe v Sn; Fe v Ni. Khi nhng cc cp kim loi trn vo dung dch axit, s cp kim loi trong Fe b ph hu trc lA. 1.

B. 2.

C. 4.

D. 3. thi TSC 2007

Cu 179: Cho cc hp kim sau: Cu-Fe (I); Zn-Fe (II); Fe-C (III); Sn-Fe (IV). Khi tip xc vi dung dch cht in li th cc hp kim m trong Fe u b n mn trc l:A. I, II v IV.

B. I, II v III.

C. I, III v IV.

D. II, III v IV. thi TSHC khi A 2009Cu 180: Bit rng ion Pb2+ trong dung dch oxi ha c Sn. Khi nhng hai thanh kim loi Pb v Sn c ni vi nhau bng dy dn in vo mt dung dch cht in li thA. ch c Pb b n mn in ho.B. ch c Sn b n mn in ho.

C. c Pb v Sn u khng b n mn in ho.D. c Pb v Sn u b n mn in ho. thi TSHC khi A 2008

Cu 181: C 4 dung dch ring bit: a) HCl, b) CuCl2 , c) FeCl3, d) HCl c ln CuCl2. Nhng vo mi dung dch mt thanh Fe nguyn cht. S trng hp xut hin n mn in ho lA. 1.

B. 2.

C. 0.

D. 3. thi TSHC khi B 2007

Cu 182: Tin hnh bn th nghim sau:- Th nghim 1: Nhng thanh Fe vo dung dch FeCl3;

- Th nghim 2: Nhng thanh Fe vo dung dch CuSO4 ;

- Th nghim 3: Nhng thanh Cu vo dung dch FeCl3;

- Th nghim 4: Cho thanh Fe tip xc vi thanh Cu ri nhng vo dung dch HCl. S trng hp xut hin n mn in ho l

A. 3.

B. 4.

C. 1.

D. 2. thi TSHC khi B 2008

Cu 183: Trong pin in ha Zn-Cu, qu trnh kh trong pin lA. Cu Cu2+ + 2e.B. Zn Zn2+ + 2e.C. Zn2+ + 2e Zn.D. Cu2+ + 2e Cu. thi TSHC khi B 2007

Cu 184: Cho bit phn ng oxi ho - kh xy ra trong pin in ho Fe Cu l:Fe + Cu2+ Fe2+ + Cu ; E0 (Fe2+/Fe) = 0,44 V, E0 (Cu2+/Cu) = + 0,34 V.

Sut in ng chun ca pin in ho Fe - Cu l

A. 1,66 V.B. 0,10 V.C. 0,78 V.D. 0,92 V. thi TSC 2008

Cu 185: Cho sut in ng chun Eo ca cc pin in ho: Eo(Cu-X) = 0,46V; Eo(Y-Cu) = 1,1V; Eo(Z-Cu) = 0,47V (X, Y, Z l ba kim loi). Dy cc kim loi xp theo chiu tng dn tnh kh t tri sang phi lA. Y, Z, Cu, X.B. Z, Y, Cu, X.C. X, Cu, Z, Y. D. X, Cu, Y, Z. thi TSHC khi B 2008

Cu 186: Cho cc th in cc chun: = -1,66V; = -0,76V; = -0,13V; = +0,34V. Trong cc pin sau y, pin no c sut in ng ln nht:

A. Pin Zn Cu.B. Pin Zn Pb.C. Pin Al Zn. D. Pin Pb Cu. thi TSHC khi B 2009

Cu 187: Cho sut in ng chun ca cc pin in ho: Zn-Cu l 1,1V; Cu-Ag l 0,46 V. Bit th in cc chun v c gi tr ln lt l:

A. -0,76V v +0,34V. B. -1,46V v -0,34V.

C. +1,56V v +0,64V. D. -1,56V v +0,64V.

thi TSHC khi A 2009

Cu 188: Mt pin in ho c in cc Zn nhng trong dung dch ZnSO4 v in cc Cu nhng trong dung dch CuSO4. Sau mt thi gian pin phng in th khi lngA. in cc Zn gim cn khi lng in cc Cu tng.

B. c hai in cc Zn v Cu u tng.C. in cc Zn tng cn khi lng in cc Cu gim.D. c hai in cc Zn v Cu u gim. thi TSHC khi A 2008

Cu 189: Cho bit: Pin in ho c sut in ng chun bng 1,61V c cu to bi hai cp oxi ho - kh

A. Pb2+/Pb v Cu2+/Cu.

B. Zn2+/Zn v Cu2+/Cu.

C. Mg2+/Mg v Zn2+/Zn.

D. Zn2+/Zn v Pb2+/Pb. (TSC 2010)

Cu 190: Nu vt lm bng hp kim Fe-Zn b n mn in ho th trong qu trnh n mn

A. km ng vai tr catot v b oxi ho B. st ng vai tr anot v b oxi ho

C. km ng vai tr anot v b oxi ho D. st ng vai tr catot v ion H+ b oxi ho

Cu 191: Cho gi tr th in cc chun ca mt s cp oxi ha - kh:

Cp oxi ha/ kh

E0 (V)-2,37-0,76-0,13+0,34

Phn ng no sau y xy ra?

A. X + Z2+ ( X2+ + Z

B. X + M2+ ( X2+ + M

C. Z + Y2+ ( Z2+ + Y

D. Z + M2+ ( Z2+ + M (C 2011)Cu 192: Trong qu trnh hot ng ca pin in ha Zn Cu th

A. khi lng ca in cc Zn tng

B. nng ca ion Cu2+ trong dung dch tng

C. nng ca ion Zn2+ trong dung dch tng D. khi lng ca in cc Cu gim(H khi B 2011)- in phn, iu ch, tinh chCu 193: Nguyn tc chung c dng iu ch kim loi lA. cho hp cht cha ion kim loi tc dng vi cht kh.

B. oxi ho ion kim loi trong hp cht thnh nguyn t kim loi.

C. kh ion kim loi trong hp cht thnh nguyn t kim loi.D. cho hp cht cha ion kim loi tc dng vi cht oxi ho. thi TSC 2009

Cu 194: Dy gm cc kim loi c iu ch trong cng nghip bng phng php in phn hp cht nng chy ca chng, l:A. Na, Ca, Al. B. Na, Ca, Zn. C. Na, Cu, Al. D. Fe, Ca, Al. thi TSHC khi A 2007

Cu 195: Hai kim loi c th c iu ch bng phng php in phn dung dch lA. Al v Mg.B. Na v Fe.C. Cu v Ag.D. Mg v Zn. thi TSC 2008

Cu 196: Dy cc kim loi u c th c iu ch bng phng php in phn dung dch mui ca chng l:A. Fe, Cu, Ag.B. Mg, Zn, Cu.C. Al, Fe, Cr. D. Ba, Ag, Au. thi TSHC khi A 2009

Cu 197: Khi in phn NaCl nng chy (in cc tr), ti catt xy raA. s oxi ho ion Cl-B. s oxi ho ion Na+. C. s kh ion Cl-. D. s kh ion Na+. thi TSHC khi A 2008

Cu 198: in phn nng chy Al2O3 vi anot than ch (hiu sut in phn 100%) thu c m kg Al catot v 67,2 m3 ( ktc) hn hp kh X c t khi so vi hiro bng 16. Ly 2,24 lt ( ktc) hn hp kh X sc vo dung dch nc vi trong (d) thu c 2 gam kt ta. Gi tr ca m l A. 108,0.B. 75,6.C. 54,0.D. 67,5. thi TSHC khi B 2009

Cu 199: in phn dung dch cha a mol CuSO4 v b mol NaCl (vi in cc tr, c mng ngn). dung dch sau in phn lm phenolphtalein chuyn sang mu hng th iu kin ca a v b l A. b < 2a.B. b = 2a.C. b > 2a.D. 2b = a. thi TSHC khi B 2007

Cu 200: in phn dung dch CuCl2 vi in cc tr, sau mt thi gian thu c 0,32 gam Cu catt v mt lng kh X ant. Hp th hon ton lng kh X trn vo 200 ml dung dch NaOH ( nhit thng). Sau phn ng, nng NaOH cn li l 0,05M (gi thit th tch dung dch khng thay i). Nng ban u ca dung dch NaOH l (cho Cu = 64)A. 0,15M.B. 0,2M.C. 0,1M. D. 0,05M. thi TSHC khi A 2007

Cu 201: in phn c mng ngn 500 ml dung dch cha hn hp gm CuCl2 0,1M v NaCl 0,5M (in cc tr, hiu sut in phn 100%) vi cng dng in 5A trong 3860 giy. Dung dch thu c sau in phn c kh nng ho tan m gam Al. Gi tr ln nht ca m lA. 4,05.B. 2,70.C. 1,35.D. 5,40. thi TSHC khi B 2009

Cu 202: Kim loi M c th c iu ch bng cch kh ion ca n trong oxit bi kh H2 nhit cao. Mt khc, kim loi M kh c ion H+ trong dung dch axit long thnh H2. Kim loi M l

A. Mg.B. Al.C. Cu.D. Fe. (TSC 2010)

Cu 203: in phn dung dch CuSO4 vi anot bng ng (anot tan) v in phn dung dch CuSO4 vi anot bng graphit (in cc tr) u c c im chung l

A. catot xy ra s kh: Cu2+ + 2e Cu.

B. catot xy ra s oxi ho: 2H2O + 2e 2OH + H2.

C. anot xy ra s oxi ho: Cu Cu2+ + 2e.

D. anot xy ra s kh: 2H2O O2 + 4H+ + 4e. (TSC 2010)

Cu 204: in phn 500 ml dung dch CuSO4 O,2M (in cc tr) cho n khi catot thu c 3,2 gam kim loi th th tch kh (ktc) thu c anot l:

A. 3,36 ltB. 1,12 ltC. 0,56 ltD. 2,24 lt (C 2011)Cu 205: Phn ng in phn dung dch CuCl2 (vi in cc tr) v phn ng n mn in ha xy ra khi nhng hp kim Zn-Cu vo dung dch HCl c c im l:

A. Phn ng xy ra lun km theo s pht sinh dng in.

B. u sinh ra Cu cc m.

C. Phn ng cc m c s tham gia ca kim loi hoc ion kim loi.

D. Phn ng cc dng u l s oxi ha Cl-. (H A 2010)

Cu 206: in phn (vi in cc tr) mt dung dch gm NaCl v CuSO4 c cng s mol, n khi catot xut hin bt kh th dng in phn. Trong c qu trnh in phn trn, sn phm thu c anot l

A. kh Cl2 va2 O2.B. kh H2 v O2.C. ch c kh Cl2.D. kh Cl2 v H2. (H A 2010)

Cu 207: in phn (in cc tr) dung dch X cha 0,2 mol CuSO4 v 0,12 mol NaCl bng dng in c cng 2A. Th tch kh (ktc) thot ra anot sau 9650 giy in phn l

A. 2,240 lt.B. 2,912 lt.C. 1,792 lt.D. 1,344 lt. (H A 2010)

Cu 208: in phn (vi in cc tr) 200 ml dd CuSO4 nng x mol/l, sau mt thi gian thu c dd Y vn con mau xanh, co khi lng giam 8g so vi dd ban u. Cho 16,8g bt Fe vao Y, sau khi cac phan ng xay ra hoan toan, thu c 12,4g kim loai. Gia tri cua x la

A. 2,25

B. 1,5

C. 1,25

D. 3,25 (H B 2010)Cu 209: Ha tan 13,68 gam mui MSO4 vo nc c dung dch X. in phn X (vi in cc tr, cng dng in khng i) trong thi gian t giy, c y gam kim loi M duy nht catot v 0,035 mol kh anot. Cn nu thi gian in phn l 2t giy th tng s mol kh thu c c hai in cc l 0,1245 mol. Gi tr ca y l

A. 4,480. B. 3,920. C. 1,680. D. 4,788. (H khi A 2011)

Cu 210: in phn dung dch gm 7,45 gam KCl v 28,2 gam Cu(NO3)2 (in cc tr, mng ngn xp) n kh khi lng dung dch gim i 10,75 gam th ngng in phn (gi thit lng nc bay hi khng ng k). Tt c cc cht tan trong dung dch sau in phn l

A. KNO3 v KOH. B. KNO3, KCl v KOH. C KNO3 v Cu(NO3)2. D. KNO3, HNO3 v Cu(NO3)2. (H khi A 2011)

Cu 211: Khi in phn dung dch NaCl (cc m bng st, cc dng bng than ch, c mng ngn xp) th:

A. cc dng xy ra qu trinh oxi ha ion Na+ v cc m xy ra qu trnh kh ion Cl-.

B. cc m xy ra qu trnh kh H2O v cc dng xy ra qu trnh oxi ha Cl-.

C. cc m xy ra qu trnh oxi ha H2O v cc dng x ra qu trnh kh ion Cl-.

D. cc m xy ra qu trnh kh ion Na+ v cc dng xy ra qu trnh oxi ha ion Cl-.(H khi A 2011)

- Kl tc dng axit HCl, H2SO4 longCu 212: Ha tan hon ton 3,22 gam hn hp X gm Fe, Mg v Zn bng mt lng va dung dch H2SO4 long, thu c 1,344 lt hiro (ktc) v dung dch cha m gam mui. Gi tr ca m lA. 10,27.B. 9,52.C. 8,98.D. 7,25. thi TSC 2007

Cu 213: Cho 3,68 gam hn hp gm Al v Zn tc dng vi mt lng va dung dch H2SO4 10%, thu c 2,24 lt kh H2 ( ktc). Khi lng dung dch thu c sau phn ng lA. 101,68 gam. B. 88,20 gam. C. 101,48 gam.D. 97,80 gam. thi TSHC khi A 2009

Cu 214: Ho tan ht 7,74 gam hn hp bt Mg, Al bng 500 ml dung dch hn hp HCl 1M v H2SO4 0,28M thu c dung dch X v 8,736 lt kh H2 (ktc). C cn dung dch X thu c lng mui khan lA. 38,93 gam.B. 103,85 gam.C. 25,95 gam.D. 77,86 gam. thi TSC 2008

Cu 215: Cho 13,5 gam hn hp cc kim loi Al, Cr, Fe tc dng vi lng d dung dch H2SO4 long nng (trong iu kin khng c khng kh), thu c dung dch X v 7,84 lt kh H2 ( ktc).C cn dung dch X (trong iu kin khng c khng kh) c m gam mui khan. Gi tr ca m lA. 42,6B. 45,5C. 48,8D. 47,1

thi TSC 2008

Cu 216: Cho m gam hn hp Mg, Al vo 250 ml dung dch X cha hn hp axit HCl 1M v axit H2SO4 0,5M, thu c 5,32 lt H2 ( ktc) v dung dch Y (coi th tch dung dch khng i). Dung dch Y c pH lA. 1.B. 6.C. 7.D. 2. thi TSHC khi A 2007

Cu 217: Cho 1,67 gam hn hp gm hai kim loi 2 chu k lin tip thuc nhm IIA tc dng ht vi dung dch HCl (d), thot ra 0,672 lt kh H2 ( ktc). Hai kim loi lA. Be v Mg.B. Ca v Sr.C. Sr v Ba. D. Mg v Ca. thi TSHC khi B 2007

Cu 218: Cho m gam hn hp X gm Al, Cu vo dung dch HCl (d), sau khi kt thc phn ng sinh ra 3,36 lt kh ( ktc). Nu cho m gam hn hp X trn vo mt lng d axit nitric (c, ngui), sau khi kt thc phn ng sinh ra 6,72 lt kh NO2 (sn phm kh duy nht, ktc). Gi tr ca m lA. 12,3.B. 15,6.C. 10,5.D. 11,5. thi TSHC khi B 2008

Cu 219: X l kim loi thuc phn nhm chnh nhm II (hay nhm IIA). Cho 1,7 gam hn hp gm kim loi X v Zn tc dng vi lng d dung dch HCl, sinh ra 0,672 lt kh H2 ( ktc). Mt khc, khi cho 1,9 gam X tc dng vi lng d dung dch H2SO4 long, th th tch kh hiro sinh ra cha n 1,12 lt ( ktc). Kim loi X lA. Ba.B. Ca.C. Sr.D. Mg. thi TSC 2008

Cu 220: Ho tan hon ton hn hp X gm Fe v Mg bng mt lng va dung dch HCl 20%, thu c dung dch Y. Nng ca FeCl2 trong dung dch Y l 15,76%. Nng phn trm ca MgCl2 trong dung dch Y lA. 24,24%.B. 15,76%.C. 28,21%.D. 11,79%. thi TSC 2007

- Kl tc dng HNO3, H2SO4 c

Cu 221: Cho hn hp Fe, Cu phn ng vi dung dch HNO3 long. Sau khi phn ng hon ton, thu c dung dch ch cha mt cht tan v kim loi d. Cht tan lA. Fe(NO3)3.B. Fe(NO3)2.C. HNO3. D. Cu(NO3)2. thi TSHC khi B 2007

Cu 222: Cho hn hp X gm Mg v Fe vo dung dch axit H2SO4 c, nng n khi cc phn ng xy ra hon ton, thu c dung dch Y v mt phn Fe khng tan. Cht tan c trong dung dch Y lA. MgSO4 v Fe2(SO4)3.B. MgSO4, Fe2(SO4)3 v FeSO4.

C. MgSO4 v FeSO4.D. MgSO4. thi TSC 2007

Cu 223: Th tch dung dch HNO3 1M (long) t nht cn dng ho tan hon ton mt hn hp gm 0,15 mol Fe v 0,15 mol Cu l (bit phn ng to cht kh duy nht l NO)A. 0,8 lt.B. 1,0 lt.C. 0,6 lt.D. 1,2 lt. thi TSHC khi B 2008

Cu 224: Cho 3,6 gam Mg tc dng ht vi dung dch HNO3 (d), sinh ra 2,24 lt kh X (sn phm kh duy nht, ktc). Kh X lA. N2O.B. NO2.C. N2.D. NO. thi TSC 2008

Cu 225: Ha tan hon ton 12 gam hn hp Fe, Cu (t l mol 1:1) bng axit HNO3, thu c V lt (ktc) hn hp kh X (gm NO v NO2) v dung dch Y (ch cha hai mui v axit d). T khi ca X i vi H2 bng 19. Gi tr ca V lA. 2,24.B. 4,48.C. 5,60.D. 3,36. thi TSHC khi A 2007

Cu 226: Ho tan hon ton 8,862 gam hn hp gm Al v Mg vo dung dch HNO3 long, thu c dung dch X v 3,136 lt ( ktc) hn hp Y gm hai kh khng mu, trong c mt kh ha nu trong khng kh. Khi lng ca Y l 5,18 gam. Cho dung dch NaOH (d) vo X v un nng, khng c kh mi khai thot ra. Phn trm khi lng ca Al trong hn hp ban u lA. 19,53%.B. 12,80%.C. 10,52%.D. 15,25%. thi TSC 2009

Cu 227: Cho 6,72 gam Fe vo dung dch cha 0,3 mol H2SO4 c, nng (gi thit SO2 l sn phm kh duy nht). Sau khi phn ng xy ra hon ton, thu cA. 0,12 mol FeSO4.B. 0,02 mol Fe2(SO4)3 v 0,08 mol FeSO4.

C. 0,05 mol Fe2(SO4)3 v 0,02 mol Fe d.D. 0,03 mol Fe2(SO4)3 v 0,06 mol FeSO4. thi TSHC khi B 2007

Cu 228: Cho 3,024 gam mt kim loi M tan ht trong dung dch HNO3 long, thu c 940,8 ml khNxOy (sn phm kh duy nht, ktc) c t khi i vi H2 bng 22. Kh NxOy v kim loi M lA. NO v Mg.B. NO2 v Al.C. N2O v Al. D. N2O v Fe. thi TSHC khi A 2009

Cu 229: Cho hn hp gm 6,72 gam Mg v 0,8 gam MgO tc dng ht vi lng d dung dch HNO3. Sau khi cc phn ng xy ra hon ton, thu c 0,896 lt mt kh X (ktc) v dung dch Y. Lm bay hi dung dch Y thu c 46 gam mui khan. Kh X l

A. N2.B. NO.C. N2O.D. NO2. (TSC 2010)

Cu 230: Nung 2,23 gam hn hp X gm cc kim loi Fe, Al, Zn, Mg trong oxi, sau mt thi gian thu c 2,71 gam hn hp Y. Ha tan hon ton Y vo dung dch HNO3 (d), thu c 0,672 lt kh NO (sn phm kh duy nht, ktc). S mol HNO3 phn ng l

A. 0,12.

B. 0,14.

C. 0,16.

D. 0,18. (H B 2010)Cu 231: un nng m gam hn hp Cu v Fe c t l khi lng tng ng 7 : 3 vi mt lng dung dch HNO3. Khi cc phn ng kt thc, thu c 0,75m gam cht rn, dung dch X v 5,6 lt hn hp kh (ktc) gm NO v NO2 (khng c sn phm kh khc ca N+5). Bit lng HNO3 phn ng l 44,1 gam. Gi tr ca m l

A. 44,8. B. 40,5. C. 33,6. D. 50,4. (H khi A 2011)

- Kl tc dng dung dch mui

Cu 232: Cho hn hp bt Al, Fe vo dung dch cha Cu(NO3)2 v AgNO3. Sau khi cc phn ng xy ra hon ton, thu c hn hp rn gm ba kim loi l:A. Fe, Cu, Ag.B. Al, Cu, Ag.C. Al, Fe, Cu.D. Al, Fe, Ag. thi TSC 2008

Cu 233: Cho hn hp gm Fe v Zn vo dung dch AgNO3 n khi cc phn ng xy ra hon ton, thu c dung dch X gm hai mui v cht rn Y gm hai kim loi. Hai mui trong X lA. Fe(NO3)3 v Zn(NO3)2.B. Zn(NO3)2 v Fe(NO3)2.

C. AgNO3 v Zn(NO3)2.D. Fe(NO3)2 v AgNO3. thi TSHC khi A 2009

Cu 234: Cho hn hp bt gm 2,7 gam Al v 5,6 gam Fe vo 550 ml dung dch AgNO3 1M. Sau khi cc phn ng xy ra hon ton, thu c m gam cht rn. Gi tr ca m l (bit th t trong dy th in ho: Fe3+/Fe2+ ng trc Ag+/Ag)A. 32,4.B. 64,8.C. 59,4.D. 54,0. thi TSHC khi A 2008

Cu 235: Cho m1 gam Al vo 100 ml dung dch gm Cu(NO3)2 0,3M v AgNO3 0,3M. Sau khi cc phn ng xy ra hon ton th thu c m2 gam cht rn X. Nu cho m2 gam X tc dng vi lng d dung dch HCl th thu c 0,336 lt kh ( ktc). Gi tr ca m1 v m2 ln lt lA. 8,10 v 5,43.B. 1,08 v 5,43.C. 0,54 v 5,16.D. 1,08 v 5,16. thi TSC 2009

Cu 236: Tin hnh hai th nghim sau:- Th nghim 1: Cho m gam bt Fe (d) vo V1 lt dung dch Cu(NO3)2 1M;

- Th nghim 2: Cho m gam bt Fe (d) vo V2 lt dung dch AgNO3 0,1M.Sau khi cc phn ng xy ra hon ton, khi lng cht rn thu c hai th nghim u bng nhau. Gi tr ca V1 so vi V2 l

A. V1 = 10 V2.B. V1 = 5V2.C. V1 = 2 V2. D. V1 = V2. thi TSHC khi B 2008

Cu 237: Cho mt lng bt Zn vo dung dch X gm FeCl2 v CuCl2. Khi lng cht rn sau khi cc phn ng xy ra hon ton nh hn khi lng bt Zn ban u l 0,5 gam. C cn phn dung dch sau phn ng thu c 13,6 gam mui khan. Tng khi lng cc mui trong X l

A. 13,1 gam.B. 14,1 gam.C. 17,0 gam. D. 19,5 gam. thi TSHC khi B 2008

Cu 238: Cho hn hp gm 1,2 mol Mg v x mol Zn vo dung dch cha 2 mol Cu2+ v 1 mol Ag+ n khi cc phn ng xy ra hon ton, thu c mt dung dch cha ba ion kim loi. Trong cc gi tr sau y, gi tr no ca x tho mn trng hp trn?A. 1,8.B. 1,5.C. 1,2.D. 2,0. thi TSHC khi A 2009

Cu 239: Cho m gam hn hp bt Zn v Fe vo lng d dung dch CuSO4. Sau khi kt thc cc phn ng, lc b phn dung dch thu c m gam bt rn. Thnh phn phn trm theo khi lng ca Zn trong hn hp bt ban u lA. 90,27%.B. 12,67%.C. 85,30%.D. 82,20%. thi TSHC khi B 2007

Cu 240: Nhng mt thanh st nng 100 gam vo 100 ml dung dch hn hp gm Cu(NO3)2 0,2M v AgNO3 0,2M. Sau mt thi gian ly thanh kim loi ra, ra sch lm kh cn c 101,72 gam (gi thit cc kim loi to thnh u bm ht vo thanh st). Khi lng st phn ng l

A. 1,40 gam.B. 2,16 gam.C. 0,84 gam. D. 1,72 gam. thi TSHC khi B 2009

Cu 241: Nhng mt l kim loi M (ch c ho tr hai trong hp cht) c khi lng 50 gam vo 200 ml dung dch AgNO3 1M cho n khi phn ng xy ra hon ton. Lc dung dch, em c cn thu c 18,8 gam mui khan. Kim loi M lA. Fe.B. Cu.C. Mg.D. Zn. thi TSC 2009

Cu 242 : Cho 19,3 gam hn hp bt Zn va Cu co ti l mol tng ng la 1 : 2 vao dung dich cha 0,2 mol Fe2(SO4)3. Sau khi cac phan ng xay ra hoan toan, thu c m gam kim loai. Gia tri cua m la

A. 6,40B. 16,53C. 12,00D. 12,80 (H A 2010)

- Kl tc dng vi phi kimCu 243: Ho tan hon ton 2,81 gam hn hp gm Fe2O3, MgO, ZnO trong 500 ml axit H2SO4 0,1M (va ). Sau phn ng, hn hp mui sunfat khan thu c khi c cn dung dch c khi lng lA. 6,81 gam.B. 4,81 gam.C. 3,81 gam. D. 5,81 gam. thi TSHC khi A 2007

Cu 244: Cho 2,13 gam hn hp X gm ba kim loi Mg, Cu v Al dng bt tc dng hon ton vi oxi thu c hn hp Y gm cc oxit c khi lng 3,33 gam. Th tch dung dch HCl 2M va phn ng ht vi Y lA. 50 ml.B. 57 ml.C. 75 ml.D. 90 ml. thi TSHC khi A 2008

Cu 245: Nung nng 16,8 gam hn hp gm Au, Ag, Cu, Fe, Zn vi mt lng d kh O2, n khi cc phn ng xy ra hon ton, thu c 23,2 gam cht rn X. Th tch dung dch HCl 2M va phn ng vi cht rn X lA. 400 ml.B. 200 ml.C. 800 ml.D. 600 ml. thi TSC 2009

Cu 246: ho tan hon ton 2,32 gam hn hp gm FeO, Fe3O4 v Fe2O3 (trong s mol FeO bng s mol Fe2O3), cn dng va V lt dung dch HCl 1M. Gi tr ca V lA. 0,16.B. 0,18.C. 0,23.D. 0,08. thi TSHC khi A 2008

Cu 247: Cho 9,12 gam hn hp gm FeO, Fe2O3, Fe3O4 tc dng vi dung dch HCl (d). Sau khi cc phn ng xy ra hon ton, c dung dch Y; c cn Y thu c 7,62 gam FeCl2 v m gam FeCl3. Gi tr ca m lA. 8,75.B. 9,75.C. 6,50.D. 7,80. thi TSHC khi B 2008

Cu 248: Cho 11,36 gam hn hp gm Fe, FeO, Fe2O3, Fe3O4 phn ng ht vi dung dch HNO3 long (d), thu c 1,344 lt kh NO (sn phm kh duy nht, ktc) v dung dch X. C cn dung dch X thu c m gam mui khan. Gi tr ca m lA. 35,50.B. 34,36.C. 49,09.D. 38,72. thi TSHC khi A 2008

Cu 249: t chy hon ton 7,2 gam kim loi M (c ho tr hai khng i trong hp cht) trong hn hp kh Cl2 v O2. Sau phn ng thu c 23,0 gam cht rn v th tch hn hp kh phn ng l 5,6 lt ( ktc). Kim loi M lA. Mg.B. Ca.C. Be.D. Cu. thi TSC 2009

Cu 250: Trn 5,6 gam bt st vi 2,4 gam bt lu hunh ri nung nng (trong iu kin khng c khng kh), thu c hn hp rn M. Cho M tc dng vi lng d dung dch HCl, gii phng hn hp kh X v cn li mt phn khng tan G. t chy hon ton X v G cn va V lt kh O2 (ktc). Gi tr ca V lA. 2,80.B. 3,36.C. 3,08.D. 4,48. thi TSC 2008

Cu 251: t chy hon ton 17,4 gam hn hp Mg v Al trong kh oxi (d) thu c 30,2 gam hn hp oxit. Th tch kh oxi (ktc) tham gia phn ng l:

A. 17,92 ltB. 4,48 ltC. 11,20 ltD. 8,96 lt (C 2011)- Phn ng nhit luyn

Cu 252: Cho lung kh H2 (d) qua hn hp cc oxit CuO, Fe2O3, ZnO, MgO nung nhit cao. Sau phn ng hn hp rn cn li l:A. Cu, Fe, Zn, MgO.B. Cu, Fe, ZnO, MgO.

C. Cu, Fe, Zn, Mg.D. Cu, FeO, ZnO, MgO. thi TSHC khi A 2007

Cu 253: Cho kh CO (d) i vo ng s nung nng ng hn hp X gm Al2O3, MgO, Fe3O4, CuO thu c cht rn Y. Cho Y vo dung dch NaOH (d), khuy k, thy cn li phn khng tan Z. Gi s cc phn ng xy ra hon ton. Phn khng tan Z gmA. Mg, Fe, Cu.B. MgO, Fe3O4, Cu.C. MgO, Fe, Cu.D. Mg, Al, Fe, Cu. thi TSC 2007

Cu 254: Dn t t V lt kh CO ( ktc) i qua mt ng s ng lng d hn hp rn gm CuO, Fe2O3 ( nhit cao). Sau khi cc phn ng xy ra hon ton, thu c kh X. Dn ton b kh X trn vo lng d dung dch Ca(OH)2 th to thnh 4 gam kt ta. Gi tr ca V lA. 1,120.B. 0,896.C. 0,448.D. 0,224. thi TSC 2008

Cu 255: Cho V lt hn hp kh ( ktc) gm CO v H2 phn ng vi mt lng d hn hp rn gm CuO v Fe3O4 nung nng. Sau khi cc phn ng xy ra hon ton, khi lng hn hp rn gim 0,32 gam. Gi tr ca V lA. 0,112.B. 0,560.C. 0,224.D. 0,448. thi TSHC khi A 2008

Cu 256: Cho lung kh CO (d) i qua 9,1 gam hn hp gm CuO v Al2O3 nung nng n khi phn ng hon ton, thu c 8,3 gam cht rn. Khi lng CuO c trong hn hp ban u lA. 0,8 gam.B. 8,3 gam.C. 2,0 gam. D. 4,0 gam. thi TSHC khi A 2009

Cu 257: Cho 4,48 lt kh CO ( ktc) t t i qua ng s nung nng ng 8 gam mt oxit st n khi phn ng xy ra hon ton. Kh thu c sau phn ng c t khi so vi hiro bng 20. Cng thc ca oxit st v phn trm th tch ca kh CO2 trong hn hp kh sau phn ng A. Fe3O4; 75%.B. Fe2O3; 75%.C. Fe2O3; 65%.D. FeO; 75%. thi TSC 2007

6. Kim loi kim, kim loi kim th, nhm, st: 5

- iu ch, tinh chCu 258: Trong cng nghip, natri hiroxit c sn xut bng phng phpA. in phn dung dch NaNO3, khng c mng ngn in cc.

B. in phn dung dch NaCl, c mng ngn in cc.

C. in phn dung dch NaCl, khng c mng ngn in cc.

D. in phn NaCl nng chy. thi TSC 2007

Cu 259: Thc hin cc th nghim sau:(I) Cho dung dch NaCl vo dung dch KOH.

(II) Cho dung dch Na2CO3 vo dung dch Ca(OH)2.

(III) in phn dung dch NaCl vi in cc tr, c mng ngn.

(IV) Cho Cu(OH)2 vo dung dch NaNO3. (V) Sc kh NH3 vo dung dch Na2CO3.

(VI) Cho dung dch Na2SO4 vo dung dch Ba(OH)2.Cc th nghim u iu ch c NaOH l:

A. II, III v VI.B. I, II v III.C. I, IV v V. D. II, V v VI. thi TSHC khi B 2009

Cu 260: Phn ng ho hc xy ra trong trng hp no di y khng thuc loi phn ng nhit nhm?A. Al tc dng vi Fe3O4 nung nng.B. Al tc dng vi axit H2SO4 c, nng.

C. Al tc dng vi CuO nung nng.D. Al tc dng vi Fe2O3 nung nng. thi TSC 2007

Cu 261: thu c Al2O3 t hn hp Al2O3 v Fe2O3, ngi ta ln lt:A. dng dung dch NaOH (d), kh CO2 (d), ri nung nng.B. dng kh H2 nhit cao, dung dch NaOH (d).C. dng kh CO nhit cao, dung dch HCl (d).

D. dng dung dch NaOH (d), dung dch HCl (d), ri nung nng. thi TSHC khi B 2007

Cu 262: Nguyn tc luyn thp t gang l:A. Dng CaO hoc CaCO3 kh tp cht Si, P, S, Mn, trong gang thu c thp.

B. Dng cht kh CO kh oxit st thnh st nhit cao.

C. Dng O2 oxi ho cc tp cht Si, P, S, Mn, trong gang thu c thp.

D. Tng thm hm lng cacbon trong gang thu c thp. thi TSHC khi B 2008

Cu 263: Cho 9,125 gam mui hirocacbonat phn ng ht vi dung dch H2SO4 (d), thu c dung dch cha 7,5 gam mui sunfat trung ho. Cng thc ca mui hirocacbonat l

A. NaHCO3.B. Ca(HCO3)2.C. Mg(HCO3)2.D. Ba(HCO3)2. (TSC 2010)

Cu 264: Dy gm cc kim loi c cu to mng tinh th lp phng tm khi l:

A. Li, Na, Ca.B. Na, K, Mg.C. Be, Mg, Ca.D. Li, Na, K. (TSC 2010)

Cu 265: Ho tan hon ton 6,645 gam hn hp mui clorua ca hai kim loi kim thuc hai chu k k tip nhau vo nc c dung dch X. Cho ton b dung dch X tc dng hon ton vi dung dch AgNO3 (d), thu c 18,655 gam kt ta. Hai kim loi kim trn l:

A. Na v KB. Rb v CsC. Li v NaD. K v Rb (C 2011)Cu 266: Dy gm cc kim loi u c cu to mang tinh th lp phng tm khi l:

A. Na, K, Ca, BaB. Li, Na, K, RbC. Li, Na, K , MgD. Na, K, Ca, Be (C 2011)Cu 267: Nung nong tng cp cht trong binh kin: (1) Fe + S (r), (2) Fe2O3 + CO (k), (3) Au + O2 (k), (4) Cu + Cu(NO3)2 (r), (5) Cu + KNO3 (r) , (6) Al + NaCl (r). Cac trng hp xay ra phan ng oxi hoa kim loai la :

A. (1), (3), (6)B. (2), (3), (4)C. (1), (4), (5)D. (2), (5), (6) (H A 2010)

Cu 268: Phat biu nao sau y ung ?

A. Cac kim loai: natri, bari, beri u tac dung vi nc nhit thng

B. Kim loai xeri c dung ch tao t bao quang in

C. Kim loai magie co kiu mang tinh th lp phng tm din

D. Theo chiu tng dn cua in tich hat nhn, cac kim loai kim th (t beri n bari) co nhit nong chay giam dn (H A 2010)

Cu 269: Cho 7,1 gam hn hp gm mt kim loi kim X v mt kim loi kim th Y tc dng ht vi lng d dung dch HCl long, thu c 5,6 lt kh (ktc). Kim loi X, Y l

A. natri v magie.B. liti v beri.C. kali v canxi.D. kali v bari. (H A 2010)Cu 270: Ha tan hon ton 8,94 gam hn hp gm Na, K v Ba vo nc, thu c dung dch X v 2,688 lt kh H2 (ktc). Dung dch Y gm HCl v H2SO4, t l mol tng ng l 4 : 1. Trung ha dung dch X bi dung dch Y, tng khi lng cc mui c to ra l

A. 13,70 gam.B. 18,46 gam.C. 12,78 gam.D. 14,62 gam. (H A 2010)

Cu 271: Phat biu nao sau y khng ung ?

A. dd m c cua Na2SiO3 va K2SiO3 c goi la thuy tinh long

B. am chay magie co th c dp tt bng cat kh

C. CF2Cl2 bi cm s dung do khi thai ra khi quyn thi pha huy tng ozon

D. Trong phong thi nghim, N2 c iu ch bng cach un nong dd NH4NO2 bao hoa (H B 2010)

Cu 272: Hoa tan hoan toan 2,45 gam hn hp X gm hai kim loai kim th vao 200 ml dd HCl 1,25M, thu c dung dich Y cha cac cht tan co nng mol bng nhau. Hai kim loai trong X la

A. Mg va Ca

B. Be va Mg

C. Mg va Sr

D. Be va Ca (H B 2010)

Cu 273: Phn chua c dng trong ngnh cng nghip thuc da, cng nghip giy, cht cm mu trong ngnh nhum vi, cht lm trong nc. Cng thc ha hc ca phn chua l

A. Li2SO4.Al2(SO4)3.24H2O. B. K2SO4.Al2(SO4)3.24H2O.

C. (NH4)2SO4.Al2(SO4)3.24H2O. D. (NH4)2SO4.Al2(SO4)3.24H2O. (H khi A 2011)

Cu 274: Hp cht no ca canxi c dng c tng, b bt khi gy xng?

A. Vi sng (CaO).

B. Thch cao sng (CaSO4.2H2O).

C. vi (CaCO3).

D. Thch cao nung (CaSO4.H2O). (H khi A 2011)

Cu 275: Khi lng ring ca canxi kim loi l 1,55 g/cm3. Gi thit rng, trong tinh th canxi cc ngt l nhng hnh cu chim 74% th tch tinh th, phn cn li l khe rng. Bn knh nguyn t canxi tnh theo l thuyt l

A. 0,155nm. B. 0,185 nm. C. 0,196 nm. D. 0,168 nm. (H khi A 2011)

- Tc ha hc, s phn ng

Cu 276: Cho dy cc cht: NH4Cl, (NH4)2SO4, NaCl, MgCl2, FeCl2, AlCl3. S cht trong dy tc dng vi lng d dung dch Ba(OH)2 to thnh kt ta lA. 5.

B. 4.C. 1.D. 3. thi TSC 2008

Cu 277: Cho s phn ng: NaCl (X) NaHCO3 (Y) NaNO3. X v Y c th lA. NaOH v NaClO.B. NaOH v Na2CO3.C. Na2CO3 v NaClO.D. NaClO3 v Na2CO3. thi TSC 2007

Cu 278: T hai mui X v Y thc hin cc phn ng sau:X X1 + CO2

X1 + H2O X2X2 + Y X + Y1 + H2O

X2 + 2Y X + Y2 + 2H2O

Hai mui X, Y tng ng l

A. BaCO3, Na2CO3 B. CaCO3, NaHSO4C. MgCO3, NaHCO3D. CaCO3, NaHCO3

thi TSHC khi A 2008

Cu 279: Cho 1,56 gam hn hp gm Al v Al2O3 phn ng ht vi dung dch HCl (d), thu c V lt kh H2 (ktc) v dung dch X. Nh t t dung dch NH3 n d vo dung dch X thu c kt ta, lc ht lng kt ta, nung n khi lng khng i thu c 2,04 gam cht rn. Gi tr ca V l

A. 0,448.B. 0,224.C. 1,344.D. 0,672. (TSC 2010)

Cu 280: Cho s chuyn ho sau:

CaO CaCl2 Ca(NO3)2 CaCO3.

Cng thc ca X, Y, Z ln lt l:

A. HCl, AgNO3, (NH4)2CO3.B. Cl2, AgNO3, MgCO3.

C. Cl2, HNO3, CO2.

D. HCl, HNO3, Na2CO3. (TSC 2010)

Cu 281: ho tan hon ton 6,4 gam hn hp gm kim loi R (ch c ho tr II) v oxit ca n cn va 400 ml dung dch HCl 1M. Kim loi R l:

A. BaB. CaC. BeD. Mg (C 2011)

Cu 282: Cho m gam NaOH vao 2 lit dung dich NaHCO3 nng a mol/l, thu c 2 lit dung dich X. Ly 1 lit dung dich X tac dung vi dung dich BaCl2 (d) thu c 11,82 gam kt tua. Mt khac, cho 1 lit dung dich X vao dung dich CaCl2 (d) ri un nong, sau khi kt thuc cac phan ng thu c 7,0 gam kt tua. Gia tri cua a, m tng ng la

A. 0,04 va 4,8B. 0,07 va 3,2C. 0,08 va 4,8D. 0,14 va 2,4 (H A 2010)

Cu 283: Dy gm cc kim loi c cng kiu mng tinh th lp phng tm khi l:

A. Na, K, BaB. Mg, Ca, BaC. Na, K , CaD. Li , Na, Mg(H khi B 2011)- Nc cng

Cu 284: Mt mu nc cng cha cc ion: Ca2+, Mg2+, , Cl-, . Cht c dng lm mm mu nc cng trn lA. HCl.B. H2SO4.C. Na2CO3.D. NaHCO3. thi TSHC khi B 2008

Cu 285: Hai cht c dng lm mm nc cng vnh cu lA. Na2CO3 v HCl.B. Na2CO3 v Na3PO4.

C. Na2CO3 v Ca(OH)2.D. NaCl v Ca(OH)2. thi TSC 2008

Cu 286: Mt cc nc c cha cc ion : Na+ (0,02 mol), Mg2+ (0,02 mol), Ca2+ (0,04 mol), Cl- (0,02 mol), HCO3- (0,10 mol) v SO42- (0,01 mol) . un si cc nc trn cho n khi phn ng xy ra hon ton th nc cn li trong cc

A. c tnh cng ton phnB. c tnh cng vnh cu

C. l nc mm

D. c tnh cng tm thi (C 2011)Cu 287: Dy gm cc cht u c th lm mt tnh cng tm thi ca nc l:

A. HCl, NaOH, Na2CO3 B. NaOH, Na3PO4, Na2CO3.

C. KCl, Ca(OH)2, Na2CO3. D. HCl, Ca(OH)2, Na2CO3. (H khi A 2011)

- Kl tc dng vi nc, axit, baz, mui

Cu 288: Cho mt mu hp kim Na-Ba tc dng vi nc (d), thu c dung dch X v 3,36 lt H2 (ktc). Th tch dung dch axit H2SO4 2M cn dng trung ho dung dch X lA. 60ml.B. 150ml.C. 30ml.D. 75ml. thi TSC 2007

Cu 289: Khi cho 100ml dung dch KOH 1M vo 100ml dung dch HCl thu c dung dch c cha 6,525 gam cht tan. Nng mol (hoc mol/l) ca HCl trong dung dch dng lA. 0,75M.B. 1M.C. 0,5M.D. 0,25M. thi TSC 2007

Cu 290: Chia m gam Al thnh hai phn bng nhau:- Phn mt tc dng vi lng d dung dch NaOH, sinh ra x mol kh H2;

- Phn hai tc dng vi lng d dung dch HNO3 long, sinh ra y mol kh N2O (sn phm kh duy nht). Quan h gia x v y l

A. x = 2y.B. y = 2x.C. x = 4y.D. x = y. thi TSC 2008

Cu 291: Cho hn hp gm Na v Al c t l s mol tng ng l 1 : 2 vo nc (d). Sau khi cc phn ng xy ra hon ton, thu c 8,96 lt kh H2 ( ktc) v m gam cht rn khng tan. Gi tr ca m l

A. 5,4.B. 7,8.C. 10,8.D. 43,2. thi TSHC khi A 2008

Cu 292: Hn hp X gm Na v Al. Cho m gam X vo mt lng d nc th thot ra V lt kh. Nu cng cho m gam X vo dung dch NaOH (d) th c 1,75V lt kh. Thnh phn phn trm theo khi lng ca Na trong X l (bit cc th tch kh o trong cng iu kin)A. 77,31%.B. 39,87%.C. 49,87%.D. 29,87%. thi TSHC khi B 2007

Cu 293: Ho tan hon ton 2,9 gam hn hp gm kim loi M v oxit ca n vo nc, thu c 500 ml dung dch cha mt cht tan c nng 0,04M v 0,224 lt kh H2 ( ktc). Kim loi M l A. Na.B. Ca.C. Ba.D. K. thi TSHC khi B 2009

Cu 294: Ho tan hon ton 0,3 mol hn hp gm Al v Al4C3 vo dung dch KOH (d), thu c a mol hn hp kh v dung dch X. Sc kh CO2 (d) vo dung dch X, lng kt ta thu c l 46,8 gam. Gi tr ca a lA. 0,55.B. 0,60.C. 0,45.D. 0,40. thi TSHC khi A 2008

Cu 295: Cho 29,8 gam hn hp bt gm Zn v Fe vo 600 ml dung dch CuSO4 0,5M. Sau khi cc phn ng xy ra hon ton, thu c dung dch X v 30,4 gam hn hp kim loi. Phn trm v khi lng ca Fe trong hn hp ban u l

A. 37,58%.B. 56,37%.C. 64,42%.D. 43,62%. (TSC 2010)

- CO2, SO2, P2O5 td dung dch kim

Cu 296: Nung 13,4 gam hn hp 2 mui cacbonat ca 2 kim loi ha tr 2, thu c 6,8 gam cht rn v kh X. Lng kh X sinh ra cho hp th vo 75 ml dung dch NaOH 1M, khi lng mui khan thu c sau phn ng l A. 5,8 gam.B. 4,2 gam.C. 6,3 gam. D. 6,5 gam. thi TSHC khi B 2007

Cu 297: Hp th hon ton 4,48 lt kh CO2 (ktc) vo 500 ml dung dch hn hp gm NaOH 0,1M v Ba(OH)2 0,2M, sinh ra m gam kt ta. Gi tr ca m lA. 9,85.B. 11,82.C. 19,70.D. 17,73. thi TSHC khi A 2008

Cu 298: Cho 0,448 lt kh CO2 ( ktc) hp th ht vo 100 ml dung dch cha hn hp NaOH 0,06M v Ba(OH)2 0,12M, thu c m gam kt ta. Gi tr ca m lA. 1,182.B. 3,940.C. 1,970.D. 2,364. thi TSHC khi A 2009

Cu 299: Hp th hon ton 2,688 lt kh CO2(ktc) vo 2,5 lt dung dch Ba(OH)2 nng a mol/l, thu c 15,76 gam kt ta. Gi tr ca a lA. 0,032.B. 0,048.C. 0,06.D. 0,04. thi TSHC khi A 2007

Cu 300: Cho 100 ml dung dch KOH 1,5M vo 200 ml dung dch H3PO4 0,5M, thu c dung dch X. C cn dung dch X, thu c hn hp gm cc cht lA. KH2PO4 v K3PO4.B. KH2PO4 v K2HPO4.

C. KH2PO4 v H3PO4.D. K3PO4 v KOH. thi TSHC khi B 2009

Cu 301: Cho 0,1 mol P2O5 vo dung dch cha 0,35 mol KOH. Dung dch thu c c cc cht:A. K2HPO4, KH2PO4.B. K3PO4, KOH.C. H3PO4, KH2PO4.D. K3PO4, K2HPO4. thi TSHC khi B 2008

Cu 302: Hp th hon ton 3,36 lt kh CO2 (ktc) vo 125 ml dung dch Ba(OH)2 1M, thu c dung dch X. Coi th tch dung dch khng thay i, nng mol ca cht tan trong dung dch X l

A. 0,4M.B. 0,6M.C. 0,1M.D. 0,2M. (TSC 2010)

Cu 303: Hp th hon ton 0,672 lt kh CO2 (ktc) vo 1 lt dung dch gm NaOH 0,025M v Ca(OH)2 0,0125M, thu c x gam kt ta. Gi tr ca x l

A. 2,00. B. 0,75. C. 1,00. D. 1,25. (H khi A 2011)

Cu 304: Hp th hon ton 2,24 lt CO2 (ktc) vo 100 ml dung dch gm K2CO3 0,2M v KOH x mol/lt , sau khi cc phn ng xy ra hon ton thu c dung dch Y. Cho ton b Y tc dng vi dung dch BaCl2 (d), thu c 11,82 gam kt ta. Gi tr ca x l:

A. 1,0B . 1,4C. 1,2D. 1,6(H khi B 2011)- tc dng H+

Cu 305: Cho t t dung dch cha a mol HCl vo dung dch cha b mol Na2CO3 ng thi khuy u, thu c V lt kh ( ktc) v dung dch X. Khi cho d nc vi trong vo dung dch X thy c xut hin kt ta. Biu thc lin h gia V vi a, b l:A. V = 22,4(a - b). B. V = 11,2(a - b). C. V = 11,2(a + b). D. V = 22,4(a + b). thi TSHC khi A 2007

Cu 306: Dung dch X cha hn hp gm Na2CO3 1,5M v KHCO3 1M. Nh t t tng git cho n ht 200 ml dung dch HCl 1M vo 100 ml dung dch X, sinh ra V lt kh ( ktc). Gi tr ca V lA. 4,48.B. 3,36.C. 2,24.D. 1,12. thi TSHC khi A 2009

Cu 307: Cho 1,9 gam hn hp mui cacbonat v hirocacbonat ca kim loi kim M tc dng ht vi dung dch HCl (d), sinh ra 0,448 lt kh ( ktc). Kim loi M lA. Na.B. Li.C. K.D. Rb. thi TSHC khi B 2008

Cu 308: Nhit phn hon ton 40 gam mt loi qung lmit c ln tp cht tr sinh ra 8,96 lt kh CO2(ktc). Thnh phn phn trm v khi lng ca CaCO3.MgCO3 trong loi qung nu trn lA. 50%.B. 84%.C. 40%.D. 92%. thi TSHC khi B 2008

Cu 309: Nh t t tng git n ht 30 ml dung dch HCl 1M vo 100 ml dung dch cha Na2CO3 0,2M v NaHCO3 0,2M, sau phn ng thu c s mol CO2 l

A. 0,030.B. 0,010.C. 0,020.D. 0,015. (H A 2010)

- Tnh lng tnh ca Al(OH)3, Zn(OH)2Cu 310: Nh t t cho n d dung dch NaOH vo dung dch AlCl3. Hin tng xy ra lA. c kt ta keo trng, sau kt ta tan.B. ch c kt ta keo trng.

C. c kt ta keo trng v c kh bay ln.D. khng c kt ta, c kh bay ln. thi TSHC khi A 2007

Cu 311: Nh t t 0,25 lt dung dch NaOH 1,04M vo dung dch gm 0,024 mol FeCl3; 0,016 mol Al2(SO4)3 v 0,04 mol H2SO4 thu c m gam kt ta. Gi tr ca m lA. 2,568.B. 1,560.C. 4,128.D. 5,064. thi TSC 2009

Cu 312: Ho tan hon ton 47,4 gam phn chua KAl(SO4)2.12H2O vo nc, thu c dung dch X. Cho ton b X tc dng vi 200 ml dung dch Ba(OH)2 1M, sau phn ng thu c m gam kt ta. Gi tr ca m l A. 7,8.B. 46,6.C. 54,4.D. 62,2. thi TSC 2009

Cu 313: Trn dung dch cha a mol AlCl3 vi dung dch cha b mol NaOH. thu c kt ta th cn c t lA. a : b = 1 : 4.B. a : b < 1 : 4.C. a : b = 1 : 5.D. a : b > 1 : 4. thi TSHC khi A 2007

Cu 314: Cho 200 ml dung dch AlCl3 1,5M tc dng vi V lt dung dch NaOH 0,5M, lng kt ta thu c l 15,6 gam. Gi tr ln nht ca V lA. 1,2.B. 1,8.C. 2,4.D. 2. thi TSHC khi B 2007

Cu 315: Cho V lt dung dch NaOH 2M vo dung dch cha 0,1 mol Al2(SO4)3 v 0,1 mol H2SO4 n khi phn ng hon ton, thu c 7,8 gam kt ta. Gi tr ln nht ca V thu c lng kt ta trn l A. 0,35.B. 0,45.C. 0,25.D. 0,05. thi TSHC khi A 2008

Cu 316: Thm m gam kali vo 300ml dung dch cha Ba(OH)2 0,1M v NaOH 0,1M thu c dung dch X. Cho t t dung dch X vo 200ml dung dch Al2(SO4)3 0,1M thu c kt ta Y. thu c lng kt ta Y ln nht th gi tr ca m lA. 1,59.B. 1,17.C. 1,95.D. 1,71. thi TSC 2007

Cu 317: Ho tan ht m gam ZnSO4 vo nc c dung dch X. Cho 110 ml dung dch KOH 2M vo X, thu c a gam kt ta. Mt khc, nu cho 140 ml dung dch KOH 2M vo X th cng thu c a gam kt ta. Gi tr ca m l

A. 20,125.B. 22,540.C. 12,375. D. 17,710. thi TSHC khi A 2009

Cu 318: Ho tan hon ton m gam hn hp X gm Na2O v Al2O3 vo H2O thu c 200 ml dung dch Y ch cha cht tan duy nht c nng 0,5M. Thi kh CO2 (d) vo Y thu c a gam kt ta. Gi tr ca m v a ln lt lA. 8,3 v 7,2.B. 11,3 v 7,8.C. 13,3 v 3,9.D. 8,2 v 7,8. thi TSC 2009Cu 319: Nh t t dung dch NaOH n d vo dung dch X. Sau khi cc phn ng xy ra hon ton ch thu c dung dch trong sut. Cht tan trong dung dch X l

A. CuSO4.B. Fe(NO3)3.C. AlCl3.D. Ca(HCO3)2. (TSC 2010)

Cu 320: Hoa tan hoan toan m gam ZnSO4 vao nc c dung dich X. Nu cho 110 ml dung dich KOH 2M vao X thi thu c 3a gam kt tua. Mt khac, nu cho 140 ml dung dich KOH 2M vao X thi thu c 2a gam kt tua. Gia tri cua m la

A. 32,20B. 24,15C. 17,71D. 16,10 (H A 2010)

Cu 321: Cho cac cht: NaHCO3, CO, Al(OH)3, Fe(OH)3, HF, Cl2, NH4Cl. S cht tac dung c vi dung dich NaOH loang nhit thng la

A. 4B. 5C. 3D. 6 (H A 2010)

Cu 322: Cho 150 ml dd KOH 1,2M tac dung vi 100 ml dd AlCl3 nng x mol/l, thu c dd Y va 4,68 gam kt tua. Loai bo kt tua, thm tip 175 ml dd KOH 1,2M vao Y, thu c 2,34 gam kt tua. Gia tri cua x la

A. 1,2

B. 0,8

C. 0,9

D. 1,0 (H B 2010)

Cu 323: Pht biu no sau y l sai?

A. Na2CO3 l nguyn liu quan trng trong cng nghip sn xut thy tinh.

B. nhit thng, tt c kim loi kim th u tc dng c vi nc.

C. Nhm bn trong mi trng khng kh v nc l do c mng oxit Al2O3 bn vng bo v

D. Theo chiu tng dn ca in tch ht nhn, nhit nng chy ca kim loi kim gim dn(H khi B 2011)

Cu 324: Cho 400 ml dung dch E gm AlCl3 x mol/lt v Al2(SO4)3 y mol/lt tc dng vi 612 ml dung dch NaOH 1M, sau khi cc phn ng kt thc thu c 8,424 gam kt ta. Mt khc, khi cho 400 ml E tc dng vi dung dch BaCl2 (d) th thu c 33,552 gam kt ta. T l x : y l

A. 4 : 3B. 3 : 4C. 7 : 4D. 3 : 2(H khi B 2011)

Cu 325: Cho dy cc cht: SiO2, Cr(OH)3, CrO3, Zn(OH)2, NaHCO3, Al2O3. S cht trong dy tc dng c vi dung dch NaOH( c, nng) l

A. 6 B. 3C. 5D. 4(H khi B 2011)

- Phn ng nhit nhm

Cu 326: iu ch c 78 gam Cr t Cr2O3 (d) bng phng php nhit nhm vi hiu sut ca phn ng l 90% th khi lng bt nhm cn dng ti thiu lA. 81,0 gam.B. 54,0 gam.C. 40,5 gam.D. 45,0 gam. thi TSC 2009

Cu 327: Nung hn hp bt gm 15,2 gam Cr2O3 v m gam Al nhit cao. Sau khi phn ng hon ton, thu c 23,3 gam hn hp rn X. Cho ton b hn hp X phn ng vi axit HCl (d) thot ra V lt kh H2 (ktc). Gi tr ca V lA. 4,48.B. 3,36.C. 7,84.D. 10,08. thi TSHC khi B 2007

Cu 328: Khi cho 41,4 gam hn hp X gm Fe2O3, Cr2O3 v Al2O3 tc dng vi dung dch NaOH c (d), sau phn ng thu c cht rn c khi lng 16 gam. kh hon ton 41,4 gam X bng phn ng nhit nhm, phi dng 10,8 gam Al. Thnh phn phn trm theo khi lng ca Cr2O3 trong hn hp X lA. 20,33%.B. 50,67%.C. 36,71%.D. 66,67%. thi TSC 2007

Cu 329: Nung nng m gam hn hp Al v Fe2O3 (trong mi trng khng c khng kh) n khi phn ng xy ra hon ton, thu c hn hp rn Y. Chia Y thnh hai phn bng nhau:- Phn 1 tc dng vi dung dch H2SO4 long (d), sinh ra 3,08 lt kh H2 (ktc);

- Phn 2 tc dng vi dung dch NaOH (d), sinh ra 0,84 lt kh H2 (ktc). Gi tr ca m l

A. 22,75

B. 29,43.

C. 29,40.

D. 21,40. thi TSHC khi A 2008

Cu 330: Nung nng m gam hn hp gm Al v Fe3O4 trong iu kin khng c khng kh. Sau khi phn ng xy ra hon ton, thu c hn hp rn X. Cho X tc dng vi dung dch NaOH (d) thu c dung dch Y, cht rn Z v 3,36 lt kh H2 ( ktc). Sc kh CO2 (d) vo dung dch Y, thu c 39 gam kt ta. Gi tr ca m l A. 45,6. B. 48,3. C. 36,7. D. 36,7.

thi TSHC khi B 2009

Cu 331: t nng mt hn hp gm Al v 16 gam Fe2O3 (trong iu kin khng c khng kh) n khi phn ng xy ra hon ton, thu c hn hp rn X. Cho X tc dng va vi V ml dung dch NaOH 1M sinh ra 3,36 lt H2 (ktc). Gi tr ca V lA. 150.B. 100.C. 200.D. 300. thi TSC 2008

Cu 332: Thc hin cc phn ng nhit nhm hn hp gm m gam Al v 4,56 gam Cr2O3 (trong iu kin khng c O2), sau khi phn ng kt thc, thu c hn hp X. Cho ton b X vo mt lng d dung dch HCl (long, nng), sau khi cc phn ng xy ra hon ton, thu c 2,016 lt H2 (ktc). Cn nu cho ton b X vo mt lng d dung dch NaOH (c, nng), sau khi phn ng kt thc th s mol NaOH phn ng l:

A. 0,06 molB. 0,14 molC. 0,08 molD. 0,16 mol(H khi B 2011)- Fe p dng cng thc kinh nghim

Cu 333: Nung m gam bt st trong oxi, thu c 3 gam hn hp cht rn X. Ha tan ht hn hp X trong dung dch HNO3(d), thot ra 0,56 lt (ktc) NO (l sn phm kh duy nht). Gi tr ca m l A. 2,52.B. 2,22.C. 2,32.D. 2,62. thi TSHC khi B 2007

Cu 334: Cho 11,36 gam hn hp gm Fe, FeO, Fe2O3 v Fe3O4 phn ng ht vi dung dch HNO3 long (d), thu c 1,344 lt kh NO (sn phm kh duy nht, ktc) v dung dch X. C cn dung dch X thu c m gam mui khan. Gi tr ca m lA. 35,50.B. 34,36.C. 49,09.D. 38,72. thi TSHC khi A 2008

Cu 335: Nung hn hp gm 10,8 gam Al v 16,0 gam Fe2O3 (trong iu kin khng c khng kh), sau khi phn ng xy ra hon ton thu c cht rn Y. Khi lng kim loi trong Y l:

A. 5,6 gamB. 22,4 gamC. 11,2 gamD.16,6 gam (C 2011)Cu 336: Dy gm cc oxit u b Al kh nhit cao l:

A. FeO, CuO, Cr2O3 B. PbO, K2O, SnO C. FeO, MgO, CuO D. Fe3O4, SnO, BaO (C 2011)Cu 337: Trn 10,8g bt Al vi 34,8g bt Fe3O4 ri tin hanh phan ng nhit nhm trong iu kin khng co khng khi. Hoa tan hoan toan hn hp rn sau phan ng bng dd H2SO4 loang (d) thu c 10,752 lit khi H2 (ktc). Hiu sut cua phan ng nhit nhm la

A. 80%

B. 90%

C. 70%

D. 60% (H B 2010)Cu 338: Kh hon ton m gam oxit MxOy cn va 17,92 lt kh CO (ktc), thu c a gam kim loi M. Ha tan ht a gam M bng dung dch H2SO4 c nng (d), thu c 20,16 lt kh SO2 (sn phm kh duy nht, ktc). Oxit MxOy l

A. Cr2O3.

B. FeO.

C. Fe3O4.

D. CrO. (H B 2010)- Fe, Cu tc dng HNO3, H2SO4 c

Cu 339: Cho hn hp Fe, Cu phn ng vi dung dch HNO3 long. Sau khi phn ng hon ton, thu c dung dch ch cha mt cht tan v kim loi d. Cht tan lA. Fe(NO3)3B. Fe(NO3)2C. HNO3. D. Cu(NO3)2. thi TSHC khi B 2007

Cu 340: Cho hn hp X gm Mg v Fe vo dung dch axit H2SO4 c, nng n khi cc phn ng xy ra hon ton, thu c dung dch Y v mt phn Fe khng tan. Cht tan c trong dung dch Y l

A. MgSO4 v Fe2(SO4)3.B. MgSO4, Fe2(SO4)3 v FeSO4.

C. MgSO4 v FeSO4.D. MgSO4. thi TSC 2007

Cu 341: Cho 6,72 gam Fe vo dung dch cha 0,3 mol H2SO4 c, nng (gi thit SO2 l sn phm kh duy nht). Sau khi phn ng xy ra hon ton, thu cA. 0,12 mol FeSO4.B. 0,02 mol Fe2(SO4)3 v 0,08 mol FeSO4.

C. 0,05 mol Fe2(SO4)3 v 0,02 mol Fe d. D. 0,03 mol Fe2(SO4)3 v 0,06 mol FeSO4. thi TSHC khi B 2007

Cu 342: Th tch dung dch HNO3 1M (long) t nht cn dng ho tan hon ton mt hn hp gm 0,15 mol Fe v 0,15 mol Cu l (bit phn ng to cht kh duy nht l NO)A. 0,8 lt.B. 1,0 lt.C. 0,6 lt.D. 1,2 lt. thi TSHC khi B 2008

Cu 343: Ha tan hon ton 12 gam hn hp Fe, Cu (t l mol 1:1) bng axit HNO3, thu c V lt (ktc) hn hp kh X (gm NO v NO2) v dung dch Y (ch cha hai mui v axit d). T khi ca X i vi H2 bng 19. Gi tr ca V lA. 2,24.B. 4,48.C. 5,60.D. 3,36. thi TSHC khi A 2007

Cu 344: Cho 6,72 gam Fe vo 400 ml dung dch HNO3 1M, n khi phn ng xy ra hon ton, thu c kh NO (sn phm kh duy nht) v dung dch X. Dung dch X c th ho tan ti a m gam Cu. Gi tr ca m l A. 1,92.B. 3,20.C. 0,64.D. 3,84. thi TSHC khi A 2009Cu 345: Cho 61,2 gam hn hp X gm Cu v Fe3O4 tc dng vi dung dch HNO3 long, un nng v khuy u. Sau khi cc phn ng xy ra hon ton, thu c 3,36 lt kh NO (sn phm kh duy nht, ktc), dung dch Y v cn li 2,4 gam kim loi. C cn dung dch Y, thu c m gam mui khan. Gi tr ca m lA. 151,5.B. 137,1.C. 97,5.D. 108,9. thi TSHC khi B 2009

- Hp cht ca FeCu 346: Trong cc loi qung st, qung c hm lng st cao nht lA. hematit .B. xierit.C. hematit nu. D. manhetit. thi TSHC khi A 2008

Cu 347: Khi nung hn hp cc cht Fe(NO3)2, Fe(OH)3 v FeCO3 trong khng kh n khi lng khng i, thu c mt cht rn lA. Fe3O4.B. FeO.C. Fe.D. Fe2O3. thi TSHC khi A 2007

Cu 348: Ha tan hon ton Fe3O4 trong dung dch H2SO4 long (d) c dung dch X1. Cho lng d bt Fe vo dung dch X1 (trong iu kin khng c khng kh) n khi phn ng xy ra hon ton, thu c dung dch X2 cha cht tan lA. Fe2(SO4)3 v H2SO4.B. FeSO4.C. Fe2(SO4)3.D. FeSO4 v H2SO4. thi TSC 2008

Cu 349: Cho dy cc cht: FeO, Fe(OH)2, FeSO4, Fe3O4, Fe2(SO4)3, Fe2O3. S cht trong dy b oxi ha khi tc dng vi dung dch HNO3 c, nng lA. 3.B. 5.C. 4D. 6. thi TSC 2008

Cu 350: Trong cc cht: FeCl2, FeCl3, Fe(NO3)2, Fe(NO3)3, FeSO4, Fe2(SO4)3. S cht c c tnh oxi ho v tnh kh lA. 2.B. 3.C. 5.D. 4. thi TSC 2009

Cu 351: Cho tng cht: Fe, FeO, Fe(OH)2, Fe(OH)3, Fe3O4, Fe2O3, Fe(NO3)2, Fe(NO3)3, FeSO4, Fe2(SO4)3 , FeCO3 ln lt phn ng vi HNO3 c, nng. S phn ng thuc loi phn ng oxi ho - kh lA. 8.B. 5.C. 7.D. 6. thi TSHC khi A 2007

Cu 352: Ho tan 5,6 gam Fe bng dung dch H2SO4 long (d), thu c dung dch X. Dung dch X phn ng va vi V ml dung dch KMnO4 0,5M. Gi tr ca V lA. 80.B. 40.C. 20.D. 60. thi TSHC khi A 2007

Cu 353: ho tan hon ton 2,32 gam hn hp gm FeO, Fe3O4 v Fe2O3 (trong s mol FeO bng s mol Fe2O3), cn dng va V lt dung dch HCl 1M. Gi tr ca V lA. 0,16.B. 0,18.C. 0,23.D. 0,08. thi TSHC khi A 2008

Cu 354: Cho 9,12 gam hn hp gm FeO, Fe3O4 v Fe2O3 tc dng vi dung dch HCl (d). Sau khi cc phn ng xy ra hon ton, c dung dch Y; c cn Y thu c 7,62 gam FeCl2 v m gam FeCl3. Gi tr ca m lA. 8,75.B. 9,75.C. 6,50.D. 7,80. thi TSHC khi B 2008

Cu 355: Cho m gam hn hp X gm FeO, Fe2O3, Fe3O4 vo mt lng va dung dch HCl 2M, thu c dung dch Y c t l s mol Fe2+ v Fe3+ l 1 : 2. Chia Y thnh hai phn bng nhau. C cn phn mt thu c m1 gam mui khan. Sc kh clo (d) vo phn hai, c cn dung dch sau phn ng thu c m2 gam mui khan. Bit m2 m1 = 0,71. Th tch dung dch HCl dng l

A. 240 ml.B. 80 ml.C. 320 ml.D. 160 ml. thi TSC 2009

Cu 356: Cho 11,36 gam hn hp gm Fe, FeO, Fe2O3 v Fe3O4 phn ng ht vi dung dch HNO3 long (d), thu c 1,344 lt kh NO (sn phm kh duy nht, ktc) v dung dch X. C cn dung dch X thu c m gam mui khan. Gi tr ca m lA. 35,50.B. 34,36.C. 49,09.D. 38,72. thi TSHC khi A 2008

Cu 357: Ha tan hon ton 20,88 gam mt oxit st bng dung dch H2SO4 c, nng thu c dung dch X v 3,248 lt kh SO2 (sn phm kh duy nht, ktc). C cn dung dch X, thu c m gam mui sunfat khan. Gi tr ca m l A. 52,2.B. 54,0.C. 58,0.D. 48,4. thi TSHC khi B 2009

Cu 358: Cho 0,01 mol mt hp cht ca st tc dng ht vi H2SO4 c nng (d), thot ra 0,112 lt (ktc) kh SO2 l sn phm kh duy nht). Cng thc ca hp cht st lA. FeS.B. FeS2.C. FeO D. FeCO3. thi TSHC khi B 2007

Cu 359: Kh hon ton mt oxit st X nhit cao cn va V lt kh CO ( ktc), sau phn ng thu c 0,84 gam Fe v 0,02 mol kh CO2. Cng thc ca X v gi tr V ln lt lA. Fe3O4 v 0,224.B. Fe3O4 v 0,448.C. FeO v 0,224.D. Fe2O3 v 0,448. thi TSC 2009

Cu 360: Cho 4,48 lt kh CO ( ktc) t t i qua ng s nung nng ng 8 gam mt oxit