Question

100 mL of ether was divided into two portions of 50 mL each and two extraction was performed.  How much A will be extracted after two extraction of 50 mL each.

Answer 1

The ratio of solubilities in the two solvents is called the distribution coefficient, KD = C1/C2, which is an equilibrium constant with a characteristic value for any compound at a given temperature. The total amount extracted by 100 mL as 2 x 50 mL portions of ether is thus 0.92 g.