Cr2O72+ + 5 SO2 + 4 H3O+ → 2 (Cr)3+ + 5 SO3 + 6 H2O
This is an oxidation-reduction (redox) reaction:
5 SIV - 10 e- → 5 SVI (oxidation)
2 CrVIII + 10 e- → 2 CrIII (reduction)
SO2 is a reducing agent, Cr2O72+ is an oxidizing agent.
Reactants:
- Cr2O72+
- 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: