Cu2IISIVO4 + Fe0 2 Cu0 + FeIISVIO4

This is an oxidation-reduction (redox) reaction:

2 CuII + 4 e- 2 Cu0 (reduction)

SIV - 2 e- SVI (oxidation)

Fe0 - 2 e- FeII (oxidation)

Change the oxidation states