2 KCN (aq) + 7 PbO2 (s) + 16 HCl (aq) → 7 PbCl2 (s) + 2 KCl (aq) + 2 NO (g) + 2 CO2 (g) + 8 H2O (l)
This is an acid-base reaction (neutralization): KCN is a base, HCl is an acid.
This is an oxidation-reduction (redox) reaction:
7 PbIV + 14 e- → 7 PbII (reduction)
2 CII - 4 e- → 2 CIV (oxidation)
2 N-III - 10 e- → 2 NII (oxidation)
PbO2 is an oxidizing agent, KCN is a reducing agent, KCN is a reducing agent.
Reactants:
- KCN – Potassium cyanide
- Other names: Potassium cyanide (as CN) , Hydrocyanic acid, potassium salt , Potassium salt of hydrocyanic acid
- Appearance: White crystalline solid | deliquescent ; Hygroscopic crystals or solid in various forms with characteristic odour. odourless when dry ; White, granular or crystalline solid with a faint, almond-like odor.
- PbO2 – Lead(IV) oxide
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
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