Question

A solid substance D is soluble in ethanol to the extent of 2.6 mg / mL of ethanol at 25 °C and 12 mg / mL of ethanol at 78 °C. You have been provided with a sample that contains 40.0 mg of D and 5.0 mg of an impurity E. By showing all the calculation steps, describe how you would be able to purify D if E has the same solubility behavior as D in ethanol. Indicate the number of crystallization steps required to purify D, as well as the amount and percent recovery of pure D obtained after the crystallization steps have been completed.Show all calculations.(Assume that there are no insoluble impurities present in the sample).

Answer 1