Question

The salts that have a water of crystallization are called:
A. dehydrated salt
B. unhydrated salt
C. hydrated salt
D. water salts

Answer 1

For this problem, we have to study about the water of crystallization in brief which is also known as the water of hydration. After which we can easily choose the correct salt which is formed by water or crystallization.

Complete step by step answer:
- In the given question, we have to choose the correct salt which is formed by the water of crystallization.
- As we know that crystals are the purest form without any kind of impurity.
- Now, the water of crystallization is the presence of the water molecules in the crystal structures which do not make bonds with the crystal.
- And this crystal structure with water molecules is known as hydrated salt For example, $\text{CuS}{{\text{O}}_{4}}.5{{\text{H}}_{2}}\text{O}$.
.- Whereas when there is the absence of the water molecules or they are removed by some physical or chemical process then the salt is known as anhydrated or dehydrated salt.
- Whereas unhydrated salt is those salts which do not have any water molecule in its structure. For example, Calcium sulphate.
- Now, the water-salt is also known as saltwater is the water which has a high concentration of salt that is mainly sodium chloride.
- That's why the salt that consists of water of crystallization is known as hydrated salt.
So, the correct answer is “Option C”.

Note: When the hydrated salt is heated strongly then the loss of water takes place by the physical method and due to the loss of water from the crystal structure, the shape and colour of the crystal are also lost and converted into powder form.