) CO₂ + H₂O --> H₂CO₃

P₂O₅ + 3H₂O --> 2H₃PO₄

CaO + H₂O --> Ca(OH)₂

SO₂ + H₂O --> H₂SO₃

b) FeO + 2HCl --> FeCl₂ + H₂O

ZnO + 2HCl --> ZnCl₂ + H₂O

CaO + 2HCl --> CaCl₂ + H₂O

c) CO₂ + 2NaOH --> Na₂CO₃ + H₂O

P₂O₅ + 6NaOH --> 2Na₃PO₄ + 3H₂O

SO₂ + 2NaOH --> Na₂SO₃ + H₂O

ngu