5 C0H2O + 4 KMnVIIO4 + 6 H2SO4 4 MnIISO4 + 2 K2SO4 + 5 CIVO2 + 11 H2O

This is an oxidation-reduction (redox) reaction:

4 MnVII + 20 e- 4 MnII (reduction)

5 C0 - 20 e- 5 CIV (oxidation)

Change the oxidation states