The distribution coefficient, k= concentration in ligroin / concentration in water, between ligroin and water for solute A is 7.5. Discuss what weight of A would be removed from a solution of 10g of A in the 100mL of water by a single extraction with the 100mL of ligoin? Discuss what weight of A would be removed by four successive extractions with the 25-mL portions of ligoin? Calculate how much ligroin would be needed to remove the 98.5% of A in a single extraction?