Acompound distributes between benzene (solvent 1) and water (solvent 2) with a distribution coefficient, k = 2.7. if 1.0g of the compound were dissolved in 100ml of water, what weight of compound could be extracted by three sequential 10-ml portions of benzene?

Explanation:

The given data is as follows.

Solvent 1 = benzene,          Solvent 2 = water

  = 2.7,         = 100 mL

= 10 mL,       weight of compound = 1 g

       Extract = 3

Therefore, calculate the fraction remaining as follows.

                                  =

                                  =

                                  =

Hence, weight of compound to be extracted = weight of compound - fraction remaining

                                  = 1 -

                                  = 0.00001

or,                               =

Thus, we can conclude that weight of compound that could be extracted is .

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