FeS2 + 2 O2 → Fe + 2 SO2
This is an oxidation-reduction (redox) reaction:
2 S-I - 10 e- → 2 SIV (oxidation)
FeII + 2 e- → Fe0 (reduction)
4 O0 + 8 e- → 4 O-II (reduction)
FeS2 is a reducing agent, FeS2 is an oxidizing agent, O2 is an oxidizing agent.
Reactants:
- FeS2
- O2
Products:
- Fe
- 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.]