2 KNO3 (aq) + 2 S (s) → K2SO4 (aq) + SO2 (aq) + N2 (g)
This is an oxidation-reduction (redox) reaction:
S0 - 6 e- → SVI (oxidation)
S0 - 4 e- → SIV (oxidation)
2 NV + 10 e- → 2 N0 (reduction)
S is a reducing agent, S is a reducing agent, KNO3 is an oxidizing agent.
Reactants:
Products:
- K2SO4
- 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.]
- N2