2 Au + 2 HNO3 → H2 + 2 AuNO3
This is an oxidation-reduction (redox) reaction:
2 Au0 - 6 e- → 2 AuIII (oxidation)
2 HI + 2 e- → 2 H0 (reduction)
2 NV + 4 e- → 2 NIII (reduction)
Au is a reducing agent, HNO3 is an oxidizing agent, HNO3 is an oxidizing agent.
Reactants:
- Au
- HNO3 – Nitric acid
- Other names: Aqua fortis , Spirit of niter , Eau forte
- Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.]
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