8 HNO3 (aq) + 6 KBr (aq) → 4 H2O (l) + 2 NO (g) + 3 Br2 (aq) + 6 KNO3 (aq)
This is an oxidation-reduction (redox) reaction:
6 Br-I - 6 e- → 6 Br0 (oxidation)
2 NV + 6 e- → 2 NII (reduction)
KBr is a reducing agent, HNO3 is an oxidizing agent.
This is a gas evolution reaction, NO is the formed gas.
- 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.]
- H2O – Water, oxidane
- NO – Nitrogen monoxide , Oxidonitrogen(•) (additive)
- KNO3 – Potassium nitrate