2 Mg + 2 HCl2 → 2 MgCl2 + H2

This is an oxidation-reduction (redox) reaction:

2 HII + 4 e- → 2 H0 (reduction)

2 Mg0 - 4 e- → 2 MgII (oxidation)

HCl2 is an oxidizing agent, Mg is a reducing 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
  • HCl2

Products:

  • MgCl2
    • Names: Magnesium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Magnesium dichloride source: wikipedia, accessed: 2019-09-27, Magnesium chloride anhydrous source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-02
    • Appearance: White or colourless crystalline solid source: wikipedia, accessed: 2019-09-27; Deliquescent white solid in various forms source: ICSC, accessed: 2019-09-04
  • 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