2 CrIO + 28 KOH + 11 Cl2 → 2 KIO4 + 22 KCl + 2 K2CrO4 + 14 H2O
This is an oxidation-reduction (redox) reaction:
2 I-I - 16 e- → 2 IVII (oxidation)
22 Cl0 + 22 e- → 22 Cl-I (reduction)
2 CrIII - 6 e- → 2 CrVI (oxidation)
CrIO is a reducing agent, Cl2 is an oxidizing agent, CrIO is a reducing agent.