Question

What type of mixtures are separated by technique of crystallization?

Answer 1

Hint : Crystallization is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas. Crystallization is used to separate a solid- liquid mixture.

Complete Step By Step Answer:
Crystallization is a powerful and versatile technique to separate components from a liquid mixture. This liquid mixture may be an impure melt or a solution, which refers to the case that one or more components are dissolved in a liquid. Crystallization is a separation process that makes use of differences in solubility of the components present in the melt or the solution. Crystallization can occur when the solubility of one or more components present in the liquid is exceeded. An excellent and well-known example of a separation based on crystallization is the formation of ice in sea water.
Crystallization is also a chemical solid-liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs. Therefore, crystallization is used to separate a solid- liquid mixture. Crystallization is used to produce solid crystals from a solution. When the solution is warmed, some of the solvent evaporates leaving behind a more concentrated solution.

Note :
Crystals can be made by following methods in a laboratory 1) By cooling a hot saturated solution gently 2) By sublimation: Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. 3) By cooling a fused mass.