Question

Cold solvents are preferred for recrystallization because Group of answer choices Hot solvents catch fire easily to prevent dissolution of the crystals impurities are expected to have high solubility in cold solvents Cold solvents are cost effective

Answer 1

Crystals impurities are expected to have high solubility in cold solvents. Hence, option C is correct.

What is a cold solvent?

Cold solvent cleaning is a process used to remove grease, wax and other impurities from metal and other parts.

The process is also called degreasing. Cold solvents are sprayed onto the dirty part and it is brushed clean.

Once the filtration process is done the collected crystals should be washed with a little more ice-cold solvent to remove final soluble impurities which would otherwise be left on the surface of the crystals.

Hence, option C is correct.

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Answer 2

Cold solvents are preferred for recrystallization to prevent dissolution of the crystals impurities.

What is Recrystallization ?

Recrystallization, also known as fractional crystallization, is a procedure for purifying an impure compound in a solvent.

The method of purification is based on the principle that the solubility of most solids increases with increased temperature.

In case of recrystallization,ice–cold solvent is used to remove final soluble impurities which would otherwise be left on the surface of the crystals.

Hence, Cold solvents are preferred for recrystallization to prevent dissolution of the crystals impurities.

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