1)2Ca + O₂ -> 2CaO
2)CaO + H₂O -> Ca(OH)₂
3)Ca(OH)₂ + H₂SO₄ -> CaSO₄ + 2H₂O
4)CaSO₄ + 2NaOH -> Ca(OH)₂↓ + Na₂SO₄
5)Ca + H₂SO₄ -> CaSO₄↓ + H₂↑
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1)2Ca + O₂ -> 2CaO
2)CaO + H₂O -> Ca(OH)₂
3)Ca(OH)₂ + H₂SO₄ -> CaSO₄ + 2H₂O
4)CaSO₄ + 2NaOH -> Ca(OH)₂↓ + Na₂SO₄
5)Ca + H₂SO₄ -> CaSO₄↓ + H₂↑