I am having trouble getting the Net ionic equation for:

Question

1)MgSO4 + Na3PO4=
2)Na2CO3 + ZnCl2=
3)Na2CO3 + Na3PO4=
4) Na3PO4 +ZnCl2=

Answer 1

Mg^2+ + PO4^3- ==> Mg3(PO4)2(s). You balance.
Zn^2+ + CO3^2- ==> ZnCO3
3. no reaction
4. PO4^3- + Zn^2+ ==> Zn3(PO4)2(s) You balance.