Question

How water molecules are held in water of crystallization?

Answer 1

Hint: The bond which is reasonable for the liquid state of the water is hydrogen bonding. Hydrogen bond is an intermolecular bond that holds the water molecules together and decreases the evaporation of the water at low temperature.

Complete answer:
- In the question it is asked how water molecules are going to hold in water of crystallization.
- First we should know what water of crystallization is.
- The water molecules present in one formula unit of the salt.
- Means the number of water molecules which are present in the crystal of a salt.
- For example take calcium sulphate dihydrate.
- The chemical formula for calcium sulphate dihydrate is $CaS{{O}_{4}}.2{{H}_{2}}O$.
- The water of crystallization for calcium sulphate dihydrate is two means there are two water molecules present in calcium sulphate dihydrate.
- Means the two water molecules are reasonable for the crystallization of the calcium sulphate.
- In the same manner copper sulphate pentahydrate is going to contain five water molecules.
- The hydrogen bond which is present in the water molecules is the reason for the formation of the crystals in the salt.

Note:
The hydrogen bond is a weak bond formed in between a hydrogen atom and an atom which has a high electronegativity value. Due to the difference in electronegativity values the hydrogen bond is going to form. The hydrogen bond is more strong when compared to dipole-dipole forces which is present in between the atoms.