6 KI (aq) + 8 HNO3 (aq) → 6 KNO3 (aq) + 2 NO (g) + 3 I2 (s) + 4 H2O (l)
This is an oxidation-reduction (redox) reaction:
6 I-I - 6 e- → 6 I0 (oxidation)
2 NV + 6 e- → 2 NII (reduction)
KI is a reducing agent, HNO3 is an oxidizing agent.
This is a precipitation reaction: I2 is the formed precipitate.
This is a gas evolution reaction, NO is the formed gas.
Reactants:
- KI
- 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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