1) Fe + H₂SO₄ = FeSO₄ + H₂
Fe + 2H⁺ + SO₄²⁻ = Fe²⁺ + SO₄²⁻ + H₂
Fe + 2H⁺ = Fe²⁺ + H₂
2) Mg(OH)₂ + 2HNO₃ = Mg(NO₃)₂ + 2H₂O
Mg(OH)₂ + 2H⁺ + 2NO₃⁻ = Mg²⁺ + 2NO₃⁻ + 2H₂O
Mg(OH)₂ + 2H⁺ = Mg²⁺ + 2H₂O
3) 2KOH + CO₂ = K₂CO₃ + H₂O
2K⁺ + 2OH⁻ + CO₂ = 2K⁺ + CO₃²⁻ + H₂O
2OH⁻ + CO₂ = CO₃²⁻ + H₂O
1) Fe + H₂SO₄ = FeSO₄ + H₂
Fe + 2H⁺ + SO₄²⁻ = Fe²⁺ + SO₄²⁻ + H₂
Fe + 2H⁺ = Fe²⁺ + H₂
2) Mg(OH)₂ + 2HNO₃ = Mg(NO₃)₂ + 2H₂O
Mg(OH)₂ + 2H⁺ + 2NO₃⁻ = Mg²⁺ + 2NO₃⁻ + 2H₂O
Mg(OH)₂ + 2H⁺ = Mg²⁺ + 2H₂O
3) 2KOH + CO₂ = K₂CO₃ + H₂O
2K⁺ + 2OH⁻ + CO₂ = 2K⁺ + CO₃²⁻ + H₂O
2OH⁻ + CO₂ = CO₃²⁻ + H₂O