Assume that the partition coefficient, K, for partitioning of compound Abetween

Question

Assume that the partition coefficient, K, for partitioning of compound Abetween diethyl ether and water is 3; that is, A preferentially partitions into ether. a. Given 400 mL of an aqueous solution containing 12 g of compound A, how many grams of A could be removed from the solution by a single extraction with 200 mL of diethyl ether? b. How many total grams of A can be removed from the aqueous solution with three successive extractions of 67 mL each? PLEASE USE THE EQUATION  Fa=Cf/Ci=(Vo/KVx+Vo)! If you use "3=x/M/0.2: (12-x)/M/0.4=2x:(12-x)" Please explain how this works in detail.

Explanation / Answer

(a) suppose the molecular weight of the compound is Ma,the grams go to the ether layer is x grams so by defination 3=x/M/0.2: (12-x)/M/0.4=2x:(12-x) 2x=36-3x x=7.2g the percentage of mass in ethyl ehteri is 7.2/12=0.6    (a) suppose the molecular weight of the compound is Ma,the grams go to the ether layer is x grams so by defination 3=x/M/0.2: (12-x)/M/0.4=2x:(12-x) 2x=36-3x x=7.2g the percentage of mass in ethyl ehteri is 7.2/12=0.6   

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