Copper Sulfate and Sodium Phosphate?

Question

If you have Copper(II) Sulfate + Sodium Phosphate
what is the molecular, complete net ionic, and net ionic equations?

Answer 1

Lancenigo di Villorba (TV), Italy

Starting from complex-actions played by anions of phosphoric acid, I remember that hydrogeno-phosphate ion (e.g. HPO4--) may interact with copper ions

CuSO4(aq) + Na3PO4(aq) + H2O(aq) <--->
<---> CuHPO4(aq) + Na2SO4(aq) + NaOH(aq)

Cu++(aq) + PO4---(aq) + H2O(aq) <--->
<---> CuHPO4(aq) + OH-(aq)

Meanwhile CuHPO4 cannot precipitate, I thought it may form since copper and hydrogeno-phosphate ions carry out a significative value, as follows :

Kps = |Cu++| * |HPO4--|

remembering the Acid-Base Equilibrium forming the
hydrogeno-phosphate ion

Ka3 = |PO4---| * |OH-| / |HPO4--|

so I rearrange the terms

Kps * Ka3 = |Cu++| * |PO4---| * |OH-|

The low value of the overwritten relationship confirm the medium stability's level.

I hope this helps you.