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1. MgCO₃ + 2HCl = MgCl₂ + H₂O + CO₂
MgCO₃ + 2H⁺ + 2Cl⁻ = Mg²⁺ + 2Cl⁻ + H₂O + CO₂
MgCO₃ + 2H⁺ = Mg²⁺ + H₂O + CO₂
2. MgCl₂ + 2NaOH = Mg(OH)₂ + 2NaCl
Mg²⁺ + 2Cl⁻ + 2Na⁺ + 2OH⁻ = Mg(OH)₂ + 2Na⁺ + 2Cl⁻
Mg²⁺ + 2OH⁻ = Mg(OH)₂
3. Mg(OH)₂ + H₂SO₄ = MgSO₄ + 2H₂O
Mg(OH)₂ + 2H⁺ + SO₄²⁻ = Mg²⁺ + SO₄²⁻ + 2H₂O
Mg(OH)₂ + 2H⁺ = Mg²⁺ + 2H₂O
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