2 KClO3 (aq) + 3 S (s) → 2 KCl (aq) + 3 SO2 (aq)
This is an oxidation-reduction (redox) reaction:
3 S0 - 12 e- → 3 SIV (oxidation)
2 ClV + 12 e- → 2 Cl-I (reduction)
S is a reducing agent, KClO3 is an oxidizing agent.
Reactants:
- KClO3
- S
Products:
- KCl
- 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.]