докончите
1)Na2CO3 + HCL
2)NaOH+HCL
3)Fe(OH)+HNO3
4)Mg+H2SO4

Na₂CO₃ + 2HCl = 2NaCl + CO₂↑ + H₂O;2Na⁺ + CO₃²⁻ + 2H⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + CO₂↑ + H₂O;CO₃²⁻ + 2H⁺ = CO₂↑ + H₂O.NaOH + HCl = NaCl + H₂O;Na⁺ + OH⁻ + H⁺ + Cl⁻ = Na⁺ + Cl⁻ + H₂O;OH⁻ + H⁺ = H₂O.Fe(OH)₂↓ + 2HNO₃ = Fe(NO₃)₂ + H₂O;Fe(OH)₂↓ + 2H⁺ + 2NO₃⁻ = Fe²⁺ + 2NO₃⁻ + H₂O;Fe(OH)₂↓ + 2H⁺ = Fe²⁺ + H₂O.Mg + H₂SO₄ = MgSO₄ + H₂↑;Mg⁰ + 2H⁺ + SO₄²⁻ = Mg²⁺ + SO₄²⁻ + H₂↑;Mg⁰ + 2H⁺ = Mg²⁺ + H₂↑.