Below is the titration curve for a monoprotic weak acid/weak base. In order to produce this curv you titrate the weak acid with NaOH until its all been converted to its weak base form. Recall fro general chemistry, at 1.0 equivalents of titrant (OH-), all of your original acid analyte has been neutralized (deprotonated) and is in its basic form. Please answer the following questions. 11 10 7 6. 5 3. 2 1 0.2 0.4 0.6 0.8 1 OH Equivalents a. What is the pKa of this compound? Entry Format: Please round your answer to the nearest wh number. b. At a pH of 6 will the concentration of the conjugate base be higher or lower than the concentration of conjugate acid? Entry Format: Please type the word higher or lower with no capitalization. c. Using the pKa you calculated in part a, find the percent of molecules that are in the conjugate form at a pH of 5.2. Entry Format: Please give your answer rounded to two significant figures and do not include a percent symbol. Two sig figs looks like: 1.0 60. 19. 19 Hd

Below is the titration curve for a monoprotic weak acid/weak base. In order to produce this curv you titrate the weak acid with NaOH until its all been converted to its weak base form. Recall fro general chemistry, at 1.0 equivalents of titrant (OH-), all of your original acid analyte has been neutralized (deprotonated) and is in its basic form. Please answer the following questions. 11 10 7 6. 5 3. 2 1 0.2 0.4 0.6 0.8 1 OH Equivalents a. What is the pKa of this compound? Entry Format: Please round your answer to the nearest wh number. b. At a pH of 6 will the concentration of the conjugate base be higher or lower than the concentration of conjugate acid? Entry Format: Please type the word higher or lower with no capitalization. c. Using the pKa you calculated in part a, find the percent of molecules that are in the conjugate form at a pH of 5.2. Entry Format: Please give your answer rounded to two significant figures and do not include a percent symbol. Two sig figs looks like: 1.0 60. 19. 19 Hd

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 107AP

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