Metallic magnesium is prepared by
Reduction of MgO by coke
Displacement of Mg by iron from MgSO4 solution
Electrolysis of molten MgCl2
MgCl2 Electrolysis−−−−−−−−−→ Mg+2 + 2Cl
(Molten) Cation Anion
Anode - 2Cl− → 2Cl + 2e−,Cl + Cl → Cl2
Cathode - Mg+2 + 2e− → Mg
The two metals which are extracted by means of electrolytic reduction of their molten salt are: (a) magnesium and manganese (b) iron and aluminium (c) zinc and magnesium (d) magnesium and aluminium
Mg + H2SO4 → A–– + H2 (Mg) (dilute)
Mg + 2H2SO4 → A–– + B–– + 2H2O. (Concentrated) A & B are