4. You need to make a buffer with pH as close to 10.00 as possible. Two sets of weak acidsand conjugate bases, with the Ka values, are listed below. Which of the two sets wouldbe the best choice? You want a pka close to the pH. Explain your reasoning.CH:COOH/CH;coo HCO; /CO,2-Ka = 1.80 x 10sKa = 2.14 x 10-10%3D%3D5. 5 drops of a strong base (0.1 M concentration) was added to a buffer (pH = 7.0), with noapparent change in pH. An additional 5 ml of this strong base was added, and the pH ofthe solution increased to 13.0. Explain why there was no apparent change in pH in the%3Dfirst case, but a marked change in pH in the second case.

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4. You need to make a buffer with pH as close to 10.00 as possible. Two sets of weak acids and conjugate bases, with the Ka values, are listed below. Which of the two sets would be the best choice? You want a pKa close to the pH. Explain your reasoning. CH3COOH/CH3COO HCO3 /CO;? Ka = 1.80 x 105 Ka = 2.14 x 10-10

4. You need to make a buffer with pH as close to 10.00 as possible. Two sets of weak acids and conjugate bases, with the Ka values, are listed below. Which of the two sets would be the best choice? You want a pKa close to the pH. Explain your reasoning. CH3COOH/CH3COO HCO3 /CO;? Ka = 1.80 x 105 Ka = 2.14 x 10-10

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Q3
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Q3
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