Question

what is crystallization and its application.

Answer 1

Crystallization is a technique used for the purification of substances. A separation technique to separate solids from a solution.

On adding a solid substance in a liquid and stirring it, the solid dissolves in the fluid. But when added more and more solid to the liquid, a point comes after which no more solid dissolves in the liquid. This point is called saturation point and the fluid is called saturation solution.

Crystallization process

The solution is heated in an open containerThe solvent molecules start evaporating, leaving behind the solutesWhen solution cools, crystals of solute start accumulating on the surface of the solutionCrystals are collected and dried as per the product requirementThe undissolved solids in the liquid are separated by the process of filtrationThe size of crystals formed during this process depends on the cooling rate.Large number of tiny crystals are formed, if the solution is cooled at a fast rateLarge crystals are formed at slow cooling rates

Answer 2

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