1. 0.100 g sample of phthalic acid was dissolved in 100 mL of water. When 25 ml of diethyl ether was used to extract the phthalic acid, 42 mg of the acid were recovered. What is the distribution coefficient for this extraction? Use IMF to explain your result. 2. If 500 mg of caffeine are dissolved in 100 mL of water, what percentage of caffeine can be separated using a single 40 mL methylene chloride extraction? Ko = 4.6, 25 °C.