In the Titration of a Weak Acid HA with 0

question 150

Multiple Choice

In the titration of a weak acid HA with 0.100 M NaOH, the stoichiometric point is known to occur at a pH value of approximately 10. Which of the following indicator acids would be best to use to mark the endpoint of this titration?

• A) indicator A, K_a = 10^-14
• B) indicator C, K_a = 10^-8
• C) indicator D, K_a = 10^-6
• D) indicator B, K_a = 10^-11
• E) none of these

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