3 As2S3 + 14 HClO3 + 18 H2O → 6 H3AsO4 + 9 H2SO4 + 14 HCl
This is an oxidation-reduction (redox) reaction:
6 AsIII - 12 e- → 6 AsV (oxidation)
9 S-II - 72 e- → 9 SVI (oxidation)
14 ClV + 84 e- → 14 Cl-I (reduction)
As2S3 is a reducing agent, As2S3 is a reducing agent, HClO3 is an oxidizing agent.
Reactants:
Products:
- H3AsO4 – Arsenic acid, arsoric acid
- H2SO4 – Sulfuric acid
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]