H2SeO4 + 3 SO2 + 2 H2O → Se + 3 H2SO4
This is an oxidation-reduction (redox) reaction:
SeVI + 6 e- → Se0 (reduction)
3 SIV - 6 e- → 3 SVI (oxidation)
H2SeO4 is an oxidizing agent, SO2 is a reducing agent.
Reactants:
- H2SeO4 – Selenic(VI) acid
- 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.]
- H2O – Water, oxidane
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