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 9. Which of the following indicators would be best to use to mark the endpoint of this titration? A) an indicator with K, = 10-11 B) an indicator with K, = 10-14 C) an indicator with Ka 10-9 D) an indicator with K, = 10-10 E) an indicator with K, = 10-12 A

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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 9. Which of the following indicators would be best to use to mark the
endpoint of this titration?
A) an indicator with K, = 10-11
B)
an indicator with K, = 10-14
C) an indicator with K, = 10-9
D) an indicator with K, = 10-10
E)
an indicator with K, = 10-12
O A
Transcribed Image Text: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 9. Which of the following indicators would be best to use to mark the endpoint of this titration? A) an indicator with K, = 10-11 B) an indicator with K, = 10-14 C) an indicator with K, = 10-9 D) an indicator with K, = 10-10 E) an indicator with K, = 10-12 O A
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