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Water crystallisation |
| Answer» The number of water molecules chemically combined in a definite molecular proportion with the salt in the crystalline state are called water of crystallisation.Salts that contain a definite number of water molecules as water of crystallisation are called hydrated salts.Example: Gypsum and washing soda.Conversely, salts that do not contain water of crystallisation are called anhydrous salts.Example: Anhydrous copper sulphate. | |