Question

A definite number of water molecules bound to some salt

Answer 1

A definite number of water molecules bound to some salt makes the salt hydrous this property is known as water of crystallization
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Answer 2

The definite number of water molecules attached to some salt is called as the water of crystallization.

• The exact number of water molecules present in one formula unit of a salt.
• The salt which has a specific amount of water molecules attached to it is called hydrated salts.
• The following are the example of hydrated salts:

1. Gypsum:

• It has two water molecules attached to copper sulfate.

• Its molecular formula is $CaSO_4.2H_2O$.

2. Plaster of Paris:

• It has half a molecule of water attached to copper sulfate.
• Its molecular formula is $CaSO_4.\frac{1}{2} H_2O$

Learn more about such concept

19) i)What do you mean by the term hydrated salt? Give two examples of hydrated salts which are white and state their chemical formula. ii)Why is tooth paste used for cleaning teeth?

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How can a hydrated salt can be converted into anhydrous salt

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