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Extractions rely on differences in solubility of the components that are being separated

Extractions rely on differences in solubility of the components that are being separated. The amount of a material that will transfer into the solvent in an extraction can be calculated using a partition coefficient. This is a ratio of the solubility of the material in each solvent that can be used to predict outcomes of extractions. A certain organic compound, Z, has the distribution coefficient (partition coefficient), Kp = 10.45 when partitioned between ether and water. Therefore, the equation used to determine the separation is:

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 a. Use the equation above to calculate the weight and percent of Z recovered if 6.2 g of Z in 100 mL of water are extracted with 50 mL of ether. SHOW CALCULATIONS. [ HINT: If x = wt. in ether, then (6.2-x) = wt. in water.]

 b. Suppose 6.2 g of Z in 100 mL of water are extracted with TWO consecutive 25 mL portions of ether. Calculate the weight and percent of Z recovered at EACH extraction, and the total weight AND percent when both portions are combined.

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