Question: At a pH of 4, the Cu-neocuproine complex formed in the liquid-liquid extraction experiment has a partition coefficient of about 6.7 when equilibrated between the acid aqueous solution and chloroform. Calculate the concentration of Cu in the chloroform phase if 33.0 mL of a0.30M aqueous Cu solution buffered to pH 4 is equilibrated with 23.0 mL of chloroform.