nacl (aq) + mg(no3)2 (aq) nano3 (aq) + mgcl2 (aq) 2
DESCRIPTION
Solubility Rules Soluble (will NOT form ppt’s) All nitrates, acetates, ammonium and Group 1 salts All chlorides, bromides and iodides except Ag, Pb and Hg1+ All fluorides except Group 2, Pb2+, Fe2+ All sulfates except Ca, Sr, Ba, Hg, Pb2+, and Ag Insoluble (WILL form ppts) All carbonates and phosphates except Group 1 and ammonium All hydroxides except Group 1, Sr and Ba All sulfides except Group 1, 2 and ammonium All oxides except Group 1TRANSCRIPT
NaCl (aq) + Mg(NO3)2 (aq) NaNO3 (aq) + MgCl2 (aq) 2
The solubility rules allow us to determine if a double-replacement
reaction will actually occur. Consider: 2 NaCl (aq) + Mg(NO3)2 (aq)
NaNO3 (aq) +MgCl2 (aq) 2 Did a reaction actually occur? (Hint:
Think about the 5 indicators of chemical change) Energy released
Gas evolution Color change Temperature change Precipitate formation
No, there is no reaction because all of the ions remain in
solution. How about: 2 NaCl (aq) +Pb(NO3)2 (aq) NaNO3 (aq) +PbCl2
(s) 2 Yes, because a precipitate was formed. Solubility Rules
Soluble (will NOT form ppts)
All nitrates, acetates, ammonium and Group 1 salts All chlorides,
bromides and iodides except Ag, Pb and Hg1+ All fluorides except
Group 2, Pb2+, Fe2+ All sulfates except Ca, Sr, Ba, Hg, Pb2+, and
Ag Insoluble (WILL form ppts) All carbonates and phosphates except
Group 1 and ammonium All hydroxides except Group 1, Sr and Ba All
sulfides except Group 1, 2 and ammonium All oxides except Group 1
Using your solubility rules chart predict the products for the
following double-replacement reactions. 1. Zn(NO3)2 (aq) + Na2CO3
(aq) ZnCO3 (s) + 2NaNO3 (aq) 2. Na3PO4 (aq) + (NH4)2CO3 (aq) NR 3.
BaCl2 (aq) + Na2SO4 (aq) 2 NaCl (aq) + BaSO4 (s) The ions that
remain in solution (dont form a precipitate) are called spectator
ions. In rxn 1, the spectators are Na+1 and NO3-1 In rxn 2, all of
the ions are spectatorshence no reaction In rxn 3, the spectators
are Na+1 and Cl-1 Net Ionic Reactions Something to think aboutWhen
you get a paycheck, youre more interested in the net pay than the
overall pay because the net pay is the most inherently interesting.
In net ionic reactions, only non-spectator species are actually
shown because theyre the only ones doing anything observable.
Zn(NO3)2 (aq) + Na2CO3 (aq) ZnCO3 (s) + 2NaNO3 (aq) Zn+2 (aq) +
CO32- (aq) ZnCO3 (s) 1. Write down the insoluble product, then list
the ions that had to form it as reactants. 2. Balance your net
ionic reaction and add states of matter. 3. Pat yourself on the
back, youve just balanced a net ionic rxn.