Chemistry help, balancing equations?

Question

Can you balance these? I tried to type it so it's understandable. I would greatly appreciate your help. After the equations are balanced I can do the rest of the problems myself.


(NH4)2 SO4(aq) + Ca(OH)2(c) yields CaSO4(c) + NH3(g) + H2O(l)


AgC2H3O2(aq) + Na2PO4(aq) yields Ag3PO4(c) + NaC2H3O2(aq)

The equation was given to me with the 3PO4. It may be a typing error. I know how to balance equations but I just can't figure those 2 out.

Answer 1

1)

(NH4)2SO4 + Ca(OH)2 ----> CaSO4 + 2NH3 + 2H2O

2)

3AgC2H3O2 + Na3PO4 ---> Ag3PO4 + 3 NaC2H3O2

Also refer to useful comments by the first answerer.

It appears the Na2PO4 should be Na3PO4 instead. If this is a solubility related problem, then note that Ag is not soluble.

Hope this helps.

Answer 2

First problem, two things are happening. You are precipitating calcium sulphate, and the ammonium ions (weak acid) are being neutralised by the hydroxide ions.

Second problem: it should be Na3PO4. The easiest way to do it is to see how many Ag you have in the products, and that tells you how many AgC2H3O2 you need to have in the reactants.

That should get you started. Good luck!