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2H⁺ + SO₄²⁻ + 2K⁺ + 2OH⁻ => 2K⁺ + SO4²⁻ + 2H2O
2H⁺ + 2OH⁻ => 2H₂O /:2
H⁺ +OH⁻ => H₂O
2) H₂CO₃ + Ca(OH)₂ => CaCO₃ + 2H₂O
2H⁺ + CO3²⁻ + Ca²⁺ + 2OH⁻ => Ca²⁺ + CO₃²⁻ + 2H₂O
2H⁺ + 2OH⁻ => 2H₂O /:2
H⁺ +OH⁻ => H₂O
3) 4H₃PO₄ + 3Sn(OH)₄ => Sn₃(PO₄)₄ + 12H₂O
12H⁺ + 4PO₄³⁻ 3Sn⁴⁺ + 12OH⁻ => 3Sn⁴⁺ 4PO₄³⁻ + 12H₂O
12H⁺ + 12OH⁻ => 12H₂O /:12
H⁺ +OH⁻ => H₂O
4) 2HCl + Ba(OH)₂ => BaCl₂ + 2H₂O
2H⁺ + 2Cl⁻ + Ba²⁺ + 2OH⁻ => Ba²⁺ 2Cl⁻ + 2H₂O
2H⁻ + 2OH⁻ => 2H₂O /:2
H⁺ +OH⁻ => H₂O
5) 3HNO₃ + Al(OH)₃ => Al(NO₃)₃ + 3H₂O
3H⁺ + 3NO₃⁻ + Al³⁺ +3OH⁻ => Al³⁺ + 3NO₃³⁻ + 3H₂O
3H⁺ +3OH⁻ =>3H₂O /:3
H⁺ +OH⁻ => H₂O