Why Dissolving and then reforming crystals can improve
their purity?
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Answer Posted / naveen gutta
Crystallization is a technique used to produce the purified form of the compound. Generally the purified form and the impurities will show different solubility characteristics in different solvents at different temperatures.Some compounds will dissolve at room temperature only and it can be recrystallized at a temperature less than RT. Usage of combination of two solvents (miscible/miscible depending on the solubility) is preferable for crystallization purpose.
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