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