SO2 (aq) + Fe2(SO4)3 (s) + 2 H2O (l) → 2 FeSO4 (aq) + 2 H2SO4 (aq)
This is an oxidation-reduction (redox) reaction:
SIV - 2 e- → SVI (oxidation)
2 FeIII + 2 e- → 2 FeII (reduction)
SO2 is a reducing agent, Fe2(SO4)3 is an oxidizing agent.
Reactants:
- 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.]
- Fe2(SO4)3 – Iron(III) sulfate
- H2O – Water, oxidane
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