2 Fe0 + 3 H2SVIO4 Fe2IIIO3 + 3 SIVO2 + 3 H2O

This is an oxidation-reduction (redox) reaction:

3 SVI + 6 e- 3 SIV (reduction)

2 Fe0 - 6 e- 2 FeIII (oxidation)

Change the oxidation states