3. By definition the pH of a dilute solution of a weak acid equals its pKa only when the concentrations of unionized acid [HA] equals the concentration of its ionized conjugate base (A 1. At any given pH an acid will be mostly ionized or unionized depending on its pKa. Given the following weak acids and their pka's decide whether the acid is mostly ionized or mostly unionized at the pH shown. la] CH,C=0)OH [pKa = 4.76] at pH = 5.76 [b] HC(=0)OH [pKa = 3.75) at pH = 2.75 [c] CH CH,CH,NH, [pKa 10.7] at pH = 8.7 fdj H,S [pKa = 7.0] at pH = 2 [el CH,OH [pKa = 15.5] at pH = 9.5

3. By definition the pH of a dilute solution of a weak acid equals its pKa only when the concentrations of unionized acid [HA] equals the concentration of its ionized conjugate base (A 1. At any given pH an acid will be mostly ionized or unionized depending on its pKa. Given the following weak acids and their pka's decide whether the acid is mostly ionized or mostly unionized at the pH shown. la] CH,C=0)OH [pKa = 4.76] at pH = 5.76 [b] HC(=0)OH [pKa = 3.75) at pH = 2.75 [c] CH CH,CH,NH, [pKa 10.7] at pH = 8.7 fdj H,S [pKa = 7.0] at pH = 2 [el CH,OH [pKa = 15.5] at pH = 9.5

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.87QE

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