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        Ca(OCl)₂+2H₃AsO₃→CaCl₂+H₃AsO₄
        2H₃AsO₄+3Ca(OH)₂→Ca₃(AsO₄)₂↓+6H₂O

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        2Ca(OCl)₂+2H₂O+O₂→CaCl₂+Ca(OH)₂+2HOCl

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        3FeSO₄+3Cl^-→Fe₂(SO₄)₃+FeCl₃        Fe₂(SO₄)₃+3Ca(OH)₂→2Fe(OH)₃+3CaSO₄↓
        FeCl₃+3H₂O→Fe(OH)₃+3HCl
        2HCl+Ca(OH)₂→CaCl₂+2H₂O

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        H₃AsO₃+MnO₂+H₂SO₄→H₃AsO₄+MnSO₄+H₂O
        3H₂SO₄+6Ca(OH)₂+3MnSO₄+2H₃AsO₄→Mn₃(AsO₄)₂↓+CaSO₄+12H₂O

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