Chemistry 20 - Unit 4 - Gravimetric Stoichiometry

Name: ___________________________________ 1) If 56.0 grams of iron (III) chloride reacts with 38.8 grams of solid vanadium, what mass of vanadium (V)

chloride is theoretically produced? If the percent yield of this reaction is 25.0 %, what is the actual yield of vanadium (V) chloride?

2) If 18.0 mL of 2.50 mol/L cesium sulfide reacts with 42.9 grams of nickel (III) nitride, what mass of cesium nitride is theoretically produced? What is the actual mass of cesium nitride if the percent yield is 45.0 %?

3) The invention of trinitrotoluene, otherwise known as TNT, revolutionized the mining industry. When TNT detonates, it does so according to the following unbalanced chemical equation:

C7H5N3O6(s) → N2(g) + H2O(g) + CO(g) + C(s)

If 1.0000 x 10 -1 kilograms of TNT detonates, what mass of solid carbon is theoretically produced? If the percent yield of this reaction is 60.0%, what is the actual yield of solid carbon?

I n

QF.ec3cagf3V.isi D3VClgcag 5fecs nV.CbO34SmofX3z O.comot

MmE56Og 3oT8moeignEe228.19gal mvcig O207mofx228MG162BGmol3gE76 toomuchExcess Tol0.3742170 not 473g predicted

Limiting.usethisvalue Y fetdYfedxlO0actual 0.25Apredicted 11.8

3cs.zsi 2NI.IN 0 Nizsz 2csz.tt0.045mA 479TExcess M

72.7091M M2412.74kgcsz52us olx0lOI8OL O045n9olJ McsµCg0.045 1 3 412.742

NN 42.9gxfj.nogo.s

mitino9 12.4g predictedExcess needed actual0.45 predicted 5.57

2 i 3 5 m0.10000kg1.0000 10 g 12.01g227bg

molnTNTl0000x1O4gx1mol 4o4U24xlOFmof227.15g

Ncis_4.4024 1070121 0.00000154mod

MC 0.000001541 12orgmol t 85O5xIOsg predicted

actual_1.8505105 0.600 1.1103 10 51

4) Nitrocellulose, otherwise known as guncotton, is a highly reactive and explosive gunpowder substitute that can be prepared via the nitration of cellulose. This reaction takes place according to the following unbalanced chemical equation:

HNO3(aq) + C6H10O5(s) → C6H7(NO2)3O5(s) + H2O(l)

3.0 L of 0.100 mol/L nitric acid is mixed with 162.16 g of cellulose, C6H10O5(s). What is the theoretical yield of nitrocellulose? What is the percent yield of the reaction if the actual yield of nitrocellulose is 5.0 grams?

5) Balance each of the following chemical equations using lowest whole numbers. a) NaBr(aq) + NaBrO3(aq) + H2SO4(aq) → Br2(l) + Na 2SO4(aq) + H2O(l)

b) FeS2(s) + O2(g) → Fe 2O3(s) + SO2(g)

c) I2(s) + HNO3(aq) → HIO3(aq) + NO(g) + H2O(l)

d) Sc2O3(s) + Cl 2(g) + S2Cl 2(s) → ScCl 3(s) + SOCl 2(s)

M3 33.0L 162.167Excess m0.100mm 162.1691 297,16gLimiting t.fmoeoniol mTe

Neel 0.301 31 0.10mof

MNcelt O lomolx297ie 30gCpredicfed

YoYieldsjog9 HOOK fl7I

5 3 3 3

3411 2 80 6 O 16

22

4 2 4

252 2