From the list of the instructions and tips below, select the statement that woul

Question

From the list of the instructions and tips below, select the statement that would NOT lead to a successful recrystallization O Dry the crystals by pulling air through after vacuum filtration (to help them dry). O Keep the crystals open to the air for quite a while during the drying step. O Precipitate the crystals as fast as possible. O Rinse the crystals on the filter with a small amount of the ice-cold solvent. O Use a very small amount of ice-cold solvent and a spatula to remove any crystals left in the flas

Explanation / Answer

Ans : Precipitate the crystals as fast as possible

Precipitation if done fast , can lead to the formation of impure crystals , as impurities also get stuck inside the cystals. So it must be done slowly to obtain the pure crystals . Slower the crystals form , purer they are .

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