CaO + 2HNO₃ = Ca(NO₃)₂ + H₂O
CuO + H₂SO₄ = CuSO₄ + H₂O
CaO + H₂O = Ca(OH)₂
ZnO + 2HCl = ZnCl₂ + H₂O
ZnO + 2NaOH = Zn(OH)₂ + Na₂O
CO₂ + Ca(OH)₂ = CaCO₃ + H₂O
CO₂ + H₂O = H₂CO₃
CaO + 2HNO₃ = Ca(NO₃)₂ + H₂O
CuO + H₂SO₄ = CuSO₄ + H₂O
CaO + H₂O = Ca(OH)₂
ZnO + 2HCl = ZnCl₂ + H₂O
ZnO + 2NaOH = Zn(OH)₂ + Na₂O
CO₂ + Ca(OH)₂ = CaCO₃ + H₂O
CO₂ + H₂O = H₂CO₃