4 Au + 3 NaNO3 + 16 HCl → 3 NaNO + 4 HAuCl4 + 6 H2O
This is an oxidation-reduction (redox) reaction:
4 Au0 - 12 e- → 4 AuIII (oxidation)
3 NV + 12 e- → 3 NI (reduction)
Au is a reducing agent, NaNO3 is an oxidizing agent.
Reactants:
- Au
- NaNO3 – Sodium nitrate
- 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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