CrO + 2 HNO3 → Cr(NO3)2 + H2O
This is an oxidation-reduction (redox) reaction:
2 NV + 4 e- → 2 NIII (reduction)
CrII - 4 e- → CrVI (oxidation)
HNO3 is an oxidizing agent, CrO is a reducing agent.
- 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.]