2 Cr2(SO4)3 + 9 Cl2 + 32 NaOH → 4 Na2CrO4 + 6 NaSO4 + 18 NaCl + 16 H2O
This is an oxidation-reduction (redox) reaction:
6 SVI - 6 e- → 6 SVII (oxidation)
18 Cl0 + 18 e- → 18 Cl-I (reduction)
4 CrIII - 12 e- → 4 CrVI (oxidation)
Cr2(SO4)3 is a reducing agent, Cl2 is an oxidizing agent, Cr2(SO4)3 is a reducing agent.
Warning: Unknown compound 'NaSO4'