H3PO3 + 3 Zn + 6 HCl → PH3 + 3 ZnCl2 + 3 H2O
This is an oxidation-reduction (redox) reaction:
PIII + 6 e- → P-III (reduction)
3 Zn0 - 6 e- → 3 ZnII (oxidation)
H3PO3 is an oxidizing agent, Zn is a reducing agent.
Reactants:
- H3PO3 – Phosphonic acid
- 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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