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16 November, 03:21

Why should a minimum amount of hot solvent be used for dissolving the crude solid? Why should the recrystallized solid be washed with cold solvent?

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  1. 16 November, 03:27
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    Hi

    The solid is dissolved in the hot, boiling method, the hot mixture is filtered to remove all insoluble impurities, and then the solution is allowed to cool to produce crystallization. All desired substance must be separated in crystalline form and all soluble impurities must remain dissolved in the mother liquors. Finally, the crystals are filtered off and allowed to dry. If a pure substance does not reach a pure substance, the process can be repeated using the same or another problem.

    Finally, and once the filtrate cools, said crystals are filtered by means of suction; and washed (cold) in a Büchner to completely remove adhering mother liquors, drying them to remove traces of insulation.
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