2 P0 + 5 CuIISO4 + 8 H2O 5 Cu0 + 5 H2SO4 + 2 H3PVO4

This is an oxidation-reduction (redox) reaction:

2 P0 - 10 e- 2 PV (oxidation)

5 CuII + 10 e- 5 Cu0 (reduction)

Change the oxidation states