The distribution coefficient, k= (conc. In ligroin/ conc. In water), among water and ligroin for solute A is 7.5. Explain what weight of A would be removed from a solution of 10 grams of A in 100 mL of water by single extraction with 100 mL of ligroin? Discuss what weight of A would be removed by four successive extractions with 25 mL portions of ligroin? Explain how much ligroin would be needed to remove 98.5 % of A in a single extraction?