Predicting Chemical Equations using Solubility Rules
 

Hey everyone, I have a summer assignment to work on for AP Chem. I encountered some problems when attempting the assignment.

The following are the directions and my answers. Can you please check my answers and if I get something wrong, can you explain it to me? THANKS IN ADVANCE!! :)

Predict and balance the following metathesis reactions (double replacement) based on the solubility of the products.

1. silver nitrate + potassium chromate
Ag(NO3)3 + KCrO4 --> Ag(CrO4)3 + 3KNO3

2. ammonium chloride + cobalt (II) sulfate
2NH4Cl + CoSO4 --> NO REACTION

3. lithium hydroxide + sodium chromate
2LiOH + Na2CrO4 --> Li2CrO4 + 2NaOH

4. zinc acetate + cesium hydroxide
Zn(C2H3O2)2 + 2CsOH --> An(OH)2 + 2CsC2H3O2

5. ammonium sulfide + lead (II) sulfide
(NH4)2S + PbS --> (NH4)2S + PbS

5.: where is the reaction? (the rectants and products are same)
3.: Unless the lithium chromate is insoluble(I don't know), I think the answer is NO REACTION.