1. The chemical equation when Plaster of Paris and water reacts: 𝐶𝑎𝑆𝑂₄.1/2𝐻2𝑂+3/2H₂ 𝑂 → 𝐶𝑎𝑆𝑂₄.2𝐻₂𝑂

    The chemical equation when Plaster of Paris and water reacts:

    𝐶𝑎𝑆𝑂₄.1/2𝐻2𝑂+3/2H₂ 𝑂 → 𝐶𝑎𝑆𝑂₄.2𝐻₂𝑂

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  2. When a solution of sodium hydrocarbonate (sodium hydrogen carbonate) is heated, sodium carbonate water and carbon dioxide gas evolved. 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂

    When a solution of sodium hydrocarbonate (sodium hydrogen carbonate) is heated, sodium carbonate water and carbon dioxide gas evolved.

    2NaHCO₃ → Na₂CO₃ + H₂O + CO₂

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  3. Washing soda (Na2CO3.10H2O) chemically known as sodium carbonate decahydrate  is used for softening hard water.

    Washing soda (Na2CO3.10H2O) chemically known as sodium carbonate decahydrate  is used for softening hard water.

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  4. [Ca (OH)2] Calcium hydroxide commonly known as slaked lime, on treatment with chlorine, yields bleaching powder.

    [Ca (OH)2] Calcium hydroxide commonly known as slaked lime, on treatment with chlorine, yields bleaching powder.

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