CH 203 - Exam # 2 Spring 2024
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20. In the titration of a weak acid with 0.10 M NaOH the stoichiometric point occurs
at a pH value of approximately 9.5. Which of the following indicator acids would
be the best choice to mark the endpoint of this titration?
(a) indicator A, Ka = 10-14
(b) indicator B, Ka = 10-11
(c) indicator C, Ka = 10-8
(d) indicator D, Ka = 10-6