the solubility of acetanilide in hot water Look up boiling points for the solven

Question

the solubility of acetanilide in hot water Look up boiling points for the solvents listed on page 2. Complete the b.p. column of the table in your lab notebook. The solubility of acetanilide in hot water (5.5 g/100 mL at 100 degree C) is significant and its solubility in cold water (0.53 g/100 mL at 0 degree C) is not very great. What would be the maximum theoretical percent recovery (first crop only) from the crystallization of 1.9 g of acetanilide from 55 mL of water (assuming the solution is chilled to 0 degree C)? What happens if you cool the recrystallization solution in a container of ice that is tinfinity big for the

Explanation / Answer

Solution :-

At the 0 C the solubility is 0.53 g per 100 ml water

So in the 55 ml water amount of the acetanilide that can be soluble is calculated as follows

55 ml * 0.53 g / 100 ml = 0.292 g acetanilide

So out of the 1.9 g acetanilide only 0.292 gram can be crystalized

So the percent theoretical recovery is calculated as follows

[0.292 g / 1.9 g ] *100 % = 15.37 %

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