CaSO4 (s) + C (s) → CaO (s) + SO2 (g) + CO (g)
This is an oxidation-reduction (redox) reaction:
SVI + 2 e- → SIV (reduction)
C0 - 2 e- → CII (oxidation)
CaSO4 is an oxidizing agent, C is a reducing agent.
Reactants:
- CaSO4
- C
Products:
- CaO – Calcium oxide
- 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.]
- CO – Carbon monoxide