9 (C2IIIO4-II)2- + 2 (MnVIIO4-II)- + 16 H+ 8 (H2O-III)- + 2 (MnII)2+ + 18 CIVO2-II

This is an oxidation-reduction (redox) reaction:

2 MnVII + 10 e- 2 MnII (reduction)

18 CIII - 18 e- 18 CIV (oxidation)

8 O-II + 8 e- 8 O-III (reduction)