How many milliliters of boiling water are required to dissol

How many milliliters of boiling water are required to dissolve 2.2 g acetanilide? If the solution were cooled, how many grams of acetanilide would crystallize out?

Boiling water = 5.0

cold water=0.54

Solution

solubility in hot water is 5 gm/100 ml.

so, required volume of water is =( 2.2 /5)*100 ml = 44 ml

solubility in cold water is 0.54 gm in 100 ml water.

so, amount of acetanilide soluble will be = 0.54 gm (44 ml/100 ml) = 0.2376 gm

amount of acetanilide would crystallize out = 2.2 gm - 0.2376 gm = 1.9624 gm