4 FeSO4 + K2Cr2O7 + 7 H2SO4 → 2 Fe2(SO4)3 + 2 KSO4 + Cr2(SO4)3 + 7 H2O
This is an oxidation-reduction (redox) reaction:
2 SVI - 2 e- → 2 SVII (oxidation)
4 FeII - 4 e- → 4 FeIII (oxidation)
2 CrVI + 6 e- → 2 CrIII (reduction)
Warning: Unknown compound 'KSO4'