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1) Mg + H₂SO₄ -> MgSO₄ + H₂
2) Mg + Cl₂ -> MgCl₂
3) CuO +H₂SO₃ -> CuSO₃ + H₂O
4) CuO + SO₂ -> CuSO₃
5) 2 NaOH + H₂SO₄ -> Na₂SO₄ + 2 H₂O
6) 2 NaOH + SO₃ -> Na₂SO₄ + H₂O
6.57.
1) 2 Al + 2 H₃PO₄ -> 2 AlPO₄ + 3 H₂
2) 2 Al + 3 S -> Al₂S₃
3) MgO + H₂SO₄ -> MgSO₄ + H₂O
4) MgO + SO₃ -> MgSO₄
5) Ca(OH)₂ + H₂CO₃ -> CaCO₃ + 2 H₂O
6) Ca(OH)₂ + CO₂ -> CaCO₃ + H₂O