Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when

distributed between water and benzene. Find the concentration of butanoic acid in each phase when
20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL of benzene at
(a) pH 4.00
(b) pH 10

1 answer

a. 0.12m
b. 0.2m