ICSE Class 8 Answered
what is water of crystallisation ? give the name and formulae of any five salts that have water of crystallisation.
Asked by nathsantanukumar | 23 Aug, 2018, 05:50: PM
Expert Answer
Water of Crystallisation
- Some salts, while crystallising out from their aqueous solutions, unite with a definite quantity of water which is known as water of crystallisation.
- The water of crystallisation is in loose chemical combination with salt.
- It can be driven out by heating the powdered crystals of these salts above 100°C.
Example:
When blue crystals of copper sulphate are heated in a test tube, they lose their water of crystallisation to form white-coloured powder of anhydrous copper sulphate.
Plaster of paris ( CaSO4.1/2 H2O)
Epsom salt (MgSO4.7 H2O)
Answered by Varsha | 23 Aug, 2018, 07:12: PM
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