Ca -> Ca(OH)2 -> CaCl2 Ca -> CaO -> CaCl2 Mg -> MgCl2 -> MgSo4 Mg -> MgO -> Mg(OH)2

Question

Ca -> Ca(OH)2 -> CaCl2

Ca -> CaO -> CaCl2

Mg -> MgCl2 -> MgSo4

Mg -> MgO -> Mg(OH)2

Answer 1

СаО + H2O = Ca(OH)2
Ca(OH)2 + 2HCl = CaCl2 + H2O
CaCl2 + H2CO3 = CaCO3 + 2HCl
CaCO3 = CO2 + CaO