/ Na2O+H2O →; BaO+H2O →; CaO+H2O →; K2O+H2O → K2O+HCl →; CuO+H2SO4…

Na2O+H2O → 2 NaOH BaO+H2O → Ba (OH) ₂CaO+H2O → Ca (OH) ₂K2O+H2O → 2 KOH K2O+2 HCl → 2 KCl+H₂OCuO+2 H2SO4 → CuSO₄+SO₂+2 H₂O CO2+H2O → H₂CO₃P2O5+3 H2O → 2H₃PO₄SO3+H2O → H₂SO₄CO2+2 NaOH → Na₂CO₃+H₂O P2O5+6 KOH → 2 K₃PO₄+3 H₂O SO3+2 LiOH→ Li₂SO₄+H₂O