Question

I'm wondering if I have these reactions correct..

1. Aqueous sodium phosphate mixed with aqueous copper (ii) sulfate--No reaction?

So this would mean 2Na3PO4(aq)+3CuSO4(aq)-->3Na2SO4(aq)+Cu3(PO4)2(aq)? Except I looked up Copper (ii) phosphate and it is insoluble in water, meaning that would be (s) instead of (aq) but I thought if you have a (s) in the product then a precipitate will be formed? (And there was no evidence of a precipitate formed when I did the lab-I may be wrong though).

2. Copper metal + aqueous zinc nitrate--No reaction?

Cu(s)+Zn(NO3)2(aq)-->Cu(NO3)2(aq)+Zn(aq)? But I thought Zinc was a metal, so wouldn't it be Zn(s)? But that would mean a precipitate formed, and when I did the experiment, there was no reaction.

3. Aqueous sodium carbonate + aqueous cobalt (ii) nitrate

I wasn't sure if this was a precipitation reaction or no reaction? The solution turned purple when I mixed it. I thought it was no reaction, but I looked up that Cobalt ii carbonate is insoluble in water, (s)?

Thank you!

Answer 1

1)

. Aqueous sodium phosphate mixed with aqueous copper (ii) sulfate

2Na3PO4(aq) + 3CuSO4(aq) ------------> Cu3(PO4)2 (s) + 3Na2SO4(aq)

here Cu3(PO4)2 (s) is precipitate formed .

here the reaction is possible. preicipitate formed.

2)

Copper metal + aqueous zinc nitrate--No reaction

Cu(s)+Zn(NO3)2(aq   -----------> No reaction .

here Zn is more reactive metal than copper. so copper cannot replace Zn+2.

but reverse reaction is possible

Zn(s)+Cu(NO3)2(aq) -----------------> Cu(s) + Zn(NO3)2(aq

3)

Aqueous sodium carbonate + aqueous cobalt (ii) nitrate

Na2CO3 + Co(NO3)2 --------------> CoCO3 (s) + 2 NaNO3

here CoCO3 precipitate formed