2 As2S3 + 7 HClO4 + 12 H2O → 4 H3AsO4 + 6 H2SO4 + 7 HCl
This is an oxidation-reduction (redox) reaction:
4 AsIII - 8 e- → 4 AsV (oxidation)
6 S-II - 48 e- → 6 SVI (oxidation)
7 ClVII + 56 e- → 7 Cl-I (reduction)
As2S3 is a reducing agent, As2S3 is a reducing agent, HClO4 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.]