3 H2O2 (aq) + PbS (s) → Pb(OH)2 (s) + SO2 (aq) + 2 H2O (l)
This is an oxidation-reduction (redox) reaction:
S-II - 6 e- → SIV (oxidation)
6 O-I + 6 e- → 6 O-II (reduction)
PbS is a reducing agent, H2O2 is an oxidizing agent.
Reactants:
Products:
- Pb(OH)2 – Lead(II) hydroxide
- 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.]
- H2O – Water, oxidane