Purification of Impure Samples by Crystallization Theory Our Objective Our Objective is to prepare the crystals of the following substances form their impure samples through crystallisation Copper sulphate Potash alum Benzoic acid The Theory What happens during crystallisation? The chemicals used for various purposes should be pure, completely free from any type of impurities. Method of purification of a substance depends upon the nature of impurities present in it. There are various methods for the purification of substances, e.g., filtration, evaporation, decantation, distillation, and crystallization. Crystallisation is one of the very important purification techniques, purifying substances by removing unwanted by-products. Crystalline compounds are generally purified via this crystallisation process. The principle behind the crystallisation is that the amount of solute that can be dissolved by a solvent increases with temperature. In crystallisation, the imp
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