4 KMnO4 → 2 K2O + 4 MnO + 5 O2

This is an oxidation-reduction (redox) reaction:

4 MnVII + 20 e- → 4 MnII (reduction)

10 O-II - 20 e- → 10 O0 (oxidation)

KMnO4 is an oxidizing agent, KMnO4 is a reducing agent.

Reactants:

  • KMnO4 – Potassium manganate(VII) source: wikipedia, accessed: 2019-09-27
    • Other names: Potassium permanganate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chameleon mineral source: wikipedia, accessed: 2019-09-27, Condy's crystals source: wikipedia, accessed: 2019-09-27
    • Appearance: Purplish-bronze-gray needles | magenta–rose in solution source: wikipedia, accessed: 2019-09-27; Dark purple crystals source: ICSC, accessed: 2019-09-04

Products:

  • K2O – Potassium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Potassium oxidopotassium source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Potash source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Dipotassium oxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Dipotassium monoxide source: wikidata, accessed: 2019-09-02
    • Appearance: Pale yellow solid source: wikipedia, accessed: 2019-09-27; Grey hygroscopic crystalline powder source: ICSC, accessed: 2019-09-04
  • MnO – Manganese(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Manganous oxide source: wikipedia, accessed: 2019-09-27, Manganosite source: wikipedia, accessed: 2019-09-27, Manganese monoxide source: wikipedia, accessed: 2019-09-27
    • Appearance: Green crystals or powder source: wikipedia, accessed: 2019-09-27
  • O2
    • Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04
    • Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04