Caffeine was extracted from 10.0 grams of tea leaves (containing 0.5% caffeine) by solid-liquid extraction using 100.0 ml of water and liquid-liquid extraction using DCM. Initial tests on the solubility of the caffeine on the two solvents require 2.5 ml of DCM and 20.0 ml of distilled water to completely solubilize 100.0 mg of caffeine.

a.) Compute for KD

b.) How much caffeine can be extracted by single extraction using 60.0 ml of DCM?

c.) How much caffeine can be extracted by two successive extraction using 30.0 ml of DCM per extraction procedure?