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Question
Define Hydrated salt.
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Solution
The number of water molecules found in the crystalline substance or salts is called water of crystallization. Such salts are called hydrated salts.
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Match the substances in List I with the appropriate answer in List II.
| List I | List II |
| 1. Green vitriol | A: Permanent hardness in water |
| 2. Paint | B: Hygroscopic |
| 3. Magnesium chloride | C: Temporary hardness in water |
| 4. Magnesium bicarbonate | D: Heptahydrate |
| 5. Calcium oxide | E: Colloidal |
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| 1. | Blue vitriol | CaSO4.2H2O |
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| 4. | Hygroscopic | NaOH |
The molecular formula of green vitriol is MgSO4.7H2O.
