CaCO₃+2HCl=CaCl₂+H₂O+CO₂↑
CaCO₃+2H⁺+2Cl⁻=Ca²⁺+2Cl⁻+H₂O+CO₂↑
CaCO₃+2H⁺=Ca²⁺+H₂O+CO₂↑
2NaOH+CuSO₄=Na₂SO₄+Cu(OH)₂↓
2Na⁺+2OH⁻+Cu²⁺+SO₄²⁻=2Na⁺+SO₄²⁻+Cu(OH)₂↓
2OH⁻+Cu²⁺=Cu(OH)₂↓
CaO+2HNO₃=Ca(NO₃)₂+H₂O
CaO+2H⁺+2NO₃⁻=Ca²⁺+2NO₃⁻+H₂O
CaO+2H⁺=Ca²⁺+H₂O
3BaCl₂+Fe₂(SO₄)₃=3BaSO₄↓+2FeCl₃
3Ba²⁺+6Cl⁻+2Fe³⁺+3SO₄²⁻=3BaSO₄↓+2Fe⁺³+6Cl⁻
Ba²⁺+SO₄²⁻=BaSO₄↓