4 H2O + 5 SO2 + 2 IO3- → 5 SO42- + 8 H+ + I2
This is an oxidation-reduction (redox) reaction:
5 SIV - 10 e- → 5 SVI (oxidation)
2 IV + 10 e- → 2 I0 (reduction)
SO2 is a reducing agent, IO3- is an oxidizing agent.
Reactants:
- H2O – Water, oxidane
- 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.]
- IO3-
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