2 O2 (g) + PbS (s) → SO2 (aq) + PbO2 (s)
This is an oxidation-reduction (redox) reaction:
PbII - 2 e- → PbIV (oxidation)
S-II - 6 e- → SIV (oxidation)
4 O0 + 8 e- → 4 O-II (reduction)
PbS is a reducing agent, PbS is a reducing agent, O2 is an oxidizing agent.
Reactants:
- O2
- PbS
Products:
- 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.]
- PbO2 – Lead(IV) oxide