1. Ca + 2HCl → CaCl₂ + H₂
2. 3Zn + 2H₃PO₄ → Zn₃(PO₄)₂ + 3H₂ ↑
3. BaO + H₂S → BaS + H₂O
4. Na₂O + H₂SO₄ → Na₂SO₄ + H₂O
5. Mg(OH)₂ + 2HNO₃ → Mg(NO₃)₂ + 2H₂O
6. 2Al(OH)₃ + 3H₂SO₄ → Al₂(SO₄)₃ + 6H₂O
1. Ca + 2HCl → CaCl₂ + H₂
2. 3Zn + 2H₃PO₄ → Zn₃(PO₄)₂ + 3H₂ ↑
3. BaO + H₂S → BaS + H₂O
4. Na₂O + H₂SO₄ → Na₂SO₄ + H₂O
5. Mg(OH)₂ + 2HNO₃ → Mg(NO₃)₂ + 2H₂O
6. 2Al(OH)₃ + 3H₂SO₄ → Al₂(SO₄)₃ + 6H₂O