2 AuCl3 (aq) + 3 H2O2 (aq) → 2 Au (s) + 3 O2 (g) + 6 HCl (aq)
This is an oxidation-reduction (redox) reaction:
2 AuIII + 6 e- → 2 Au0 (reduction)
6 O-I - 6 e- → 6 O0 (oxidation)
AuCl3 is an oxidizing agent, H2O2 is a reducing agent.
This is a precipitation reaction: Au is the formed precipitate.
This is a gas evolution reaction, O2 is the formed gas.
- AuCl3 – Gold(III) trichloride
- H2O2 – Hydrogen peroxide
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , Hydrochloric acid gas , HCl
- 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.]