Draw the structures of the compounds mentioned in the questions below. Circle the functional group that can be ionized You must show your calculations. Benzoic acid has a pK, of 4.20. If it is present in urine that has a pH of 5.68, what is the ratio of the concentrations of the ionized to un-ionized chemical? Calculate the fraction of the total amount of benzoic acid that is ionized in the urine. Aniline has a pKa of 4.6. If it is present in urine that has a pH of 5.45, what is the percentage of aniline that is ionized in the urine? A chemical is subjected to a partition coefficient measurement using 1-octanol and water. After equilibration and separation of the phases, the following concentrations of the chemical were measured. 1-octanol phase Water phase 0.139 µg/ml Calculate the log Kow for the chemical. 274 µg/ml

Draw the structures of the compounds mentioned in the questions below. Circle the functional group that can be ionized You must show your calculations. Benzoic acid has a pK, of 4.20. If it is present in urine that has a pH of 5.68, what is the ratio of the concentrations of the ionized to un-ionized chemical? Calculate the fraction of the total amount of benzoic acid that is ionized in the urine. Aniline has a pKa of 4.6. If it is present in urine that has a pH of 5.45, what is the percentage of aniline that is ionized in the urine? A chemical is subjected to a partition coefficient measurement using 1-octanol and water. After equilibration and separation of the phases, the following concentrations of the chemical were measured. 1-octanol phase Water phase 0.139 µg/ml Calculate the log Kow for the chemical. 274 µg/ml

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter21: Organic And Biological Molecules

Section: Chapter Questions

Problem 145CP

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