4 Al (s) + 3 MnO2 (s) 3 Mn (s) + 2 Al2O3 (s)

This is an oxidation-reduction (redox) reaction:

3 MnIV + 12 e- 3 Mn0 (reduction)

4 Al0 - 12 e- 4 AlIII (oxidation)

MnO2 is an oxidizing agent, Al is a reducing agent.

Reactants:

  • Al
    • Names: Aluminum source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02, Aluminium powder source: ICSC, accessed: 2019-09-04, Al source: wikidata, accessed: 2019-09-07
    • Appearance: Silvery-white-to-grey powder source: ICSC, accessed: 2019-09-04; Silvery-white, malleable, ductile, odorless metal. source: NIOSH NPG, accessed: 2019-09-02
  • MnO2Manganese 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

Products:

  • 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
  • Al2O3
    • Names: Aluminium oxide (Aluminum oxide) source: wikipedia, accessed: 2019-09-27, Aluminum oxide source: wikidata, accessed: 2019-09-02, Aluminium oxide source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; White powder source: ICSC, accessed: 2019-09-04; White, odorless, crystalline powder. source: NIOSH NPG, accessed: 2019-09-02