Suppose you want to make a buffer with a pH of 6.90.  Which of the following acid/conjugate base pairs should you choose? Group of answer choices HOCl and OCl- (Ka = 3.5 x 10-8) HSO4- and SO42- (Ka = 1.2 x 10-2) C6H5CO2H and C6H5CO2- (Ka = 6.5 x 10-5) HF and F- (Ka = 6.6 x 10-4)

General, Organic, and Biological Chemistry
7th Edition
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:H. Stephen Stoker
Chapter10: Acids, Bases, And Salts
Section: Chapter Questions
Problem 10.125EP: What is the pH of a buffer that is 0.150 M in a weak acid and 0.150 M in the acids conjugate base?...
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Suppose you want to make a buffer with a pH of 6.90.  Which of the following acid/conjugate base pairs should you choose?

Group of answer choices

HOCl and OCl- (Ka = 3.5 x 10-8)

HSO4- and SO42- (Ka = 1.2 x 10-2)

C6H5CO2H and C6H5CO2- (Ka = 6.5 x 10-5)

HF and F- (Ka = 6.6 x 10-4)

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