2 KMnO4 K2MnO4 + MnO2 + O2

This is an oxidation-reduction (redox) reaction:

MnVII + e- MnVI (reduction)

MnVII + 3 e- MnIV (reduction)

2 O-II - 4 e- 2 O0 (oxidation)

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

Reactants:

  • KMnO4Potassium manganate(VII) source: wikipedia, accessed on: 2019-09-27
    • Other names: Potassium permanganate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04, Chameleon mineral source: wikipedia, accessed on: 2019-09-27, Condy's crystals source: wikipedia, accessed on: 2019-09-27
    • Appearance: Purplish-bronze-gray needles | magenta–rose in solution source: wikipedia, accessed on: 2019-09-27; Dark purple crystals source: ICSC, accessed on: 2019-09-04

Products:

  • K2MnO4Potassium manganate(VI) source: wikipedia, accessed on: 2019-09-27
    • Other names: Potassium manganate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: Green crystals (darkening with time) source: wikipedia, accessed on: 2019-09-27
  • MnO2Manganese oxide source: wikipedia, accessed on: 2019-09-27, Manganese(IV) oxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Other names: Manganese dioxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04, Pyrolusite source: wikipedia, accessed on: 2019-09-27, Hyperoxide of manganese source: wikipedia, accessed on: 2019-09-27
    • Appearance: Brown-black solid source: wikipedia, accessed on: 2019-09-27; Black-to-brown powder source: ICSC, accessed on: 2019-09-04
  • O2
    • Names: Dioxygen source: wikidata, accessed on: 2019-09-07, Oxygen source: ICSC, accessed on: 2019-09-04source: wikidata, accessed on: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed on: 2019-09-04
    • Appearance: Odourless compressed gas source: ICSC, accessed on: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed on: 2019-09-04