Mg3(PO4)2 + 3 H2 → 3 Mg + 2 H3PO4

This is an oxidation-reduction (redox) reaction:

6 H0 - 6 e- → 6 HI (oxidation)

3 MgII + 6 e- → 3 Mg0 (reduction)

H2 is a reducing agent, Mg3(PO4)2 is an oxidizing agent.

Reactants:

  • Mg3(PO4)2
    • H2
      • Names: Dihydrogen source: wikidata, accessed: 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07
      • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04

    Products:

    • Mg
      • Names: Magnesium source: wikidata, accessed: 2019-09-07, Magnesium (powder) source: ICSC, accessed: 2019-09-04, Magnesium (pellets) source: ICSC, accessed: 2019-09-04
      • Appearance: Grey powder source: ICSC, accessed: 2019-09-04; Silvery-white metallic solid in various forms source: ICSC, accessed: 2019-09-04
    • H3PO4
      • Names: Phosphoric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Orthophosphoric acid source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Phosphoric(V) acid source: wikidata, accessed: 2019-09-02
      • Appearance: Hygroscopic colourless crystals source: ICSC, accessed: 2019-09-04; Thick, colorless, odorless, crystalline solid. [Note: Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02