82. Solving a chemistry problem

2. During the extraction-photometric determination of palladium, it was extracted into dichloroethane in the form of a nitroniodide complex with equal volumes of the aqueous and organic phases. Calculate the distribution coefficient D and the degree of extraction R(%) if the initial concentration of Pd2+ in the aqueous phase is С0(Pd2+) = 2.5 µg/cm3; concentration of Pd2+ in the aqueous phase after extraction С(Pd)в = 0.020 μg/cm3.