Question

During the recrystallization of an impure solid sample of acetanilide, the sample is dissolved in hot water then filtered while hot. The filtrate is allowed to cool and the mixture is filtered a second time.

After the second filtration, warm the filtrate for about 10 minutes.
After the first filtration, Place the solution in an ice-water bath for about 10 minutes.
Place the solution in a hot-water bath for about 5 minutes.
Add additional hot water to the dissolved impure acetanilide and swirl occasionally.

Answer 1

After the first filtration place the solution in an ice water bath for about 10 minutes.

Step-by-step explanation:

Recrystallization is a method of purification where impurities are removed from a sample.

Impure samples are dissolved into the appropriate liquid solvent and they will be purified on the basis of the difference in solubility between the desired compound and the impurities.

In recrystallization of Acetanilide, the sample is dissolved in hot water and filtered when hot then the filtrate is allowed to cool.

After which, the solution should be placed in an ice bath for about 10 minutes. This is in order to optimize the crystallization hence increasing the recovery of the purified acetanilide crystals.