3 H2SeO4 + 2 Au + 8 HCl → 2 H[AuCl4] + 3 SeO2 + 6 H2O
This is a complexation reaction: H[AuCl4] is the formed complex.
This is an oxidation-reduction (redox) reaction:
3 SeVI + 6 e- → 3 SeIV (reduction)
2 Au0 - 6 e- → 2 AuIII (oxidation)
H2SeO4 is an oxidizing agent, Au is a reducing agent.
Reactants:
- H2SeO4 – Selenic(VI) acid
- Au
- 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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