2 Mn2O7 → 4 MnO2 + 3 O2

This is an oxidation-reduction (redox) reaction:

4 MnVII + 12 e- → 4 MnIV (reduction)

6 O-II - 12 e- → 6 O0 (oxidation)

Mn2O7 is an oxidizing agent, Mn2O7 is a reducing agent.

Reactants:

  • Mn2O7 – Manganese(VII) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Manganic oxide source: wikipedia, accessed: 2019-09-27, Dimanganese heptoxide source: wikipedia, accessed: 2019-09-27, Permanganic oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: Dark red oil (room temp.), green if in contact with sulfuric acid source: wikipedia, accessed: 2019-09-27

Products:

  • MnO2 – Manganese oxide source: wikipedia, accessed: 2019-09-27, Manganese(IV) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Manganese dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Pyrolusite source: wikipedia, accessed: 2019-09-27, Hyperoxide of manganese source: wikipedia, accessed: 2019-09-27
    • Appearance: Brown-black solid source: wikipedia, accessed: 2019-09-27; Black-to-brown powder source: ICSC, accessed: 2019-09-04
  • 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