Crystallization is the process of getting crystals of pure substance....

What is Crystallisation?
Crystallisation is a process through which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. This process is essential in both nature and industry and is commonly used to purify substances.
How Salt is Precipitated?
Salt precipitation occurs when dissolved salt in a solution reaches a point of saturation, leading to the formation of solid crystals. Here’s how it happens:

• Preparation of the Solution: A salt solution is prepared by dissolving salt (like sodium chloride) in water.
• Evaporation: When the solution is heated or left to stand, water evaporates, increasing the concentration of salt.
• Reaching Saturation: Once the solution becomes saturated, it can no longer hold all the dissolved salt. Thus, the excess salt starts to precipitate out.
• Crystallisation: The precipitated salt forms crystals as the molecules arrange themselves in a structured form, often encouraged by cooling the solution or reducing the concentration further.
• Collection: The formed salt crystals can then be collected by filtration and dried for use.

Importance of Crystallisation
Crystallisation is not only a method for obtaining pure substances but also a fundamental process in various natural phenomena, including the formation of minerals and the behavior of biological molecules. Understanding crystallisation can enhance knowledge in chemistry and materials science.
This process illustrates the beauty and simplicity of nature's ability to form order from disorder.