2 Mg + 2 CO2 + O2 → 2 MgCO3

This is an oxidation-reduction (redox) reaction:

2 Mg0 - 4 e- → 2 MgII (oxidation)

2 O0 + 4 e- → 2 O-II (reduction)

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

Reactants:

  • 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
  • CO2
    • Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02
  • 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:

  • MgCO3
    • Names: Magnesium carbonate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Magnesite source: wikipedia, accessed: 2019-09-27source: NIOSH NPG, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Barringtonite (dihydrate) source: wikipedia, accessed: 2019-09-27
    • Appearance: White solid | hygroscopic 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