Assume that an aqueous sample contained traces of the following compounds listed

Question

Assume that an aqueous sample contained traces of the following compounds listed in the table and that you extracted the aqueous sample with an aliquot of octanol. The distribution coefficients are given as pK values. Which compound would be expected to have the highest concentration in the octanol? 2. Octanol-Water Distribution Coefficients pklogK COMPOUND NAME Benzene Toluene o-Xylene m-Xylene p-Xylene pk 2.13 2.73 3.12 3.20 3.15 Sangster, J. Phys. Chem. Ref. Data, 1 989, 18, 111 . A. Benzene B. Toluene C. o-Xylene D. m-Xylene E. p-Xylene

Explanation / Answer

pKD = -log(KD)

Higher the pKD of the compound lowest will be the cocentration in Octanol

Therefore,(A) Benzene has higher concentration in octanol

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