Cr2O7 + 4 SO2 + 6 H3O+ → 2 (Cr)3+ + 4 SO3 + 9 H2O
This is an oxidation-reduction (redox) reaction:
4 SIV - 8 e- → 4 SVI (oxidation)
2 CrVII + 8 e- → 2 CrIII (reduction)
SO2 is a reducing agent, Cr2O7 is an oxidizing agent.
Reactants:
- Cr2O7
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
- H3O+
Products:
Warning: Unknown compound 'Cr2O7'