4 HNO3 (aq) + 2 KCl (aq) + PbO2 (s) → 2 H2O (l) + Cl2 (g) + 2 KNO3 (aq) + Pb(NO3)2 (aq)
This is an oxidation-reduction (redox) reaction:
PbIV + 2 e- → PbII (reduction)
2 Cl-I - 2 e- → 2 Cl0 (oxidation)
PbO2 is an oxidizing agent, KCl is a reducing agent.
Reactants:
- 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.]
- KCl
- PbO2 – Lead(IV) oxide
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