6 H2SO4 + 2 Sb → 6 H2O + 3 SO2 + Sb2(SO4)3
This is an oxidation-reduction (redox) reaction:
3 SVI + 6 e- → 3 SIV (reduction)
2 Sb0 - 6 e- → 2 SbIII (oxidation)
H2SO4 is an oxidizing agent, Sb is a reducing agent.
Reactants:
Products:
- H2O – Water, oxidane
- 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.]
- Sb2(SO4)3 – Antimony(3+) trisulfate