When water is added to the Salt then called hydrated Salt otherwise called crystalline salt

Hydrated vs Crystal Salt
Hydrated Salt:
Hydrated salt is a type of salt that contains water molecules within its crystalline structure. This water is known as water of crystallization. When hydrated salt is heated, the water molecules are released, resulting in a change in the physical properties of the salt.
- **Water of Crystallization**: Hydrated salts contain water molecules within their crystal structure, which can be removed by heating.
- **Physical Properties**: The presence of water molecules gives hydrated salts different physical properties, such as a different appearance or texture compared to crystal salts.
- **Chemical Formula**: The chemical formula of hydrated salts includes water molecules, denoted by a dot followed by the number of water molecules (e.g., NaCl·2H2O for hydrated sodium chloride).
- **Reactivity**: Hydrated salts may exhibit different reactivity compared to crystal salts due to the presence of water molecules.
Crystal Salt:
Crystal salt, on the other hand, does not contain water molecules within its crystal structure. It is a pure form of salt that is typically obtained through evaporation of water from saltwater.
- **No Water of Crystallization**: Crystal salts do not contain water molecules within their crystal structure.
- **Physical Properties**: Crystal salts have a characteristic appearance and texture without any water molecules altering their properties.
- **Chemical Formula**: The chemical formula of crystal salts does not include water molecules.
- **Purity**: Crystal salts are considered to be purer than hydrated salts due to the absence of water molecules.
In conclusion, the main difference between hydrated and crystal salt lies in the presence of water molecules within their crystal structures. Hydrated salts contain water of crystallization, while crystal salts do not. This difference results in variations in physical properties, chemical formulas, reactivity, and purity between the two types of salt.