As2O3 (s) + 6 Zn (s) + 12 HCl (aq) → 6 ZnCl2 (aq) + 2 AsH3 (aq) + 3 H2O (l)
This is an oxidation-reduction (redox) reaction:
2 AsIII + 12 e- → 2 As-III (reduction)
6 Zn0 - 12 e- → 6 ZnII (oxidation)
As2O3 is an oxidizing agent, Zn is a reducing agent.
Reactants:
- As2O3 – Diarsenic trioxide
- Zn
- 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.]
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