If the solubility of acetanilide is 0.45 g per 100 mL of water at 0 oC, calculate how much acetanilide remains in solution during your recrystallization

Question

If the solubility of acetanilide is 0.45 g per 100 mL of water at 0 oC, calculate how much acetanilide remains in solution during your recrystallization.

Answer 1

You need to know what volume of solution that you have (since it is likely large compared to the effect of the small amount of acetanilide left, you can use the water volume). You assume that the solution is saturated (at equilibrium)

(volume in ml) (.45/100 g of Ac./ml of water)