4 Au + 16 KCN + 3 O2 + 6 H2O → 12 KOH + 4 KAu(CN)4
This is an oxidation-reduction (redox) reaction:
4 Au0 - 12 e- → 4 AuIII (oxidation)
6 O0 + 12 e- → 6 O-II (reduction)
Au is a reducing agent, O2 is an oxidizing agent.
Reactants:
- Au
- KCN – Potassium cyanide
- Other names: Potassium cyanide (as CN) , Hydrocyanic acid, potassium salt , Potassium salt of hydrocyanic acid
- Appearance: White crystalline solid | deliquescent ; Hygroscopic crystals or solid in various forms with characteristic odour. odourless when dry ; White, granular or crystalline solid with a faint, almond-like odor.
- O2
- H2O – Water, oxidane
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