3 HNO2 → HNO3 + 2 NO + H2O
This is an oxidation-reduction (redox) reaction:
2 NIII + 2 e- → 2 NII (reduction)
NIII - 2 e- → NV (oxidation)
HNO2 is both an oxidizing and a reducing agent (disproportionation (dismutation)).
Reactants:
Products:
- 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.]
- NO – Nitrogen monoxide , Oxidonitrogen(•) (additive)
- H2O – Water, oxidane