what is water of crystallization? describe an activity to show that water of crystallization gives colour to salt
Answers
Answer:
The water of crystallization means having a fixed number of molecules present in one formula of a unit of salt. Crystal salts with water of crystallization are known as hydrates. The other names of water crystallization are crystallization water or water of hydration.
Explanation:
Take a few crystals of hydrated copper sulphate in a dry test tube and heat the test tube.
We observe water droplets on the walls of the test tube.
The blue colour of copper sulphate crystals is lost and the substance has be-come white. .
Add 2 or 3 drops of water on the sample of copper sulphate obtained after heating.
The blue colour of copper sulphate is restored.
In the above activity copper sulphate crystals which seem to be dry contain the water of crystallization and when these crystals are heated the water present in crystals is evaporated and the salt turns white.
Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt.
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