4 Mn + 7 O2 → 2 Mn2O7

This is an oxidation-reduction (redox) reaction:

4 Mn0 - 28 e- → 4 MnVII (oxidation)

14 O0 + 28 e- → 14 O-II (reduction)

Mn is a reducing agent, O2 is an oxidizing agent.

Reactants:

  • Mn
    • Names: Manganese source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Mn source: wikidata, accessed: 2019-09-07, Element 25 source: wikidata, accessed: 2019-09-07
    • Appearance: Grey-white 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

Products:

  • 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