1. K₂O + H₂O = 2KOH
2. BeO + N₂O₃ = Be(NO₂)₂
3. FeO + H₂SO₄ = FeSO₄ + H₂O
4. CaO + H₂O = Ca(OH)₂
5. MgO + SiO₂ = MgSiO₃
6. BaO + 2HClO₄ = Ba(ClO₄)₂ + H₂O
7. 2NaOH + CO₂ = Na₂CO₃ + H₂O
8. 3Ba(NO₃)₂ + 2H₃PO₄ = Ba₃(PO₄)₂ + 6HNO₃
9. Fe(NO₃)₂ + 2KOH = Fe(OH)₂ + 2KNO₃
10. Bi(OH)₃ + 3HNO₃ = Bi(NO₃)₃ + 3H₂O