CO2 is an oxidizing agent, Mg is a reducing agent.
Reactants:
Mg
Names: Magnesium, Magnesium (powder), Magnesium (pellets)Mg, Element 12, Magnesium turnings
Appearance: Grey powder ; Silvery-white metallic solid in various forms
CO2
Names: Carbon dioxide, {{plainlist|, CO2Carbonic acid gas, Dry ice, [CO2], Carbonic anhydride, R-744, E-290, E 290, E290, Carbonic acid anhydride, Carbon-12 dioxide, Methanedione, Carbon oxide, CO₂, [Note: Normal constituent of air (about 300 ppm)].
Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
Products:
MgCO3
Names: Magnesium carbonate, Magnesite, Barringtonite (dihydrate)Nesequehonite (trihydrate), Lansfordite (pentahydrate), Magnesiumkarbonat, MgCO3, Magnesium carbonate anhydrous, Carbonic acid, magnesium salt, Carbonate magnesium, Hydromagnesite, Magnesium(II) carbonate, [Note: Magnesite is a naturally-occurring form of magnesium carbonate.]
Appearance: White solid | hygroscopic ; White powder ; White, odorless, crystalline powder.
Appearance: Colorless gas ; Odourless tasteless colourless compressed gas ; Colorless, odorless gas. [Note: Shipped as a nonliquefied or liquefied compressed gas.]