In the titration of a weak acid HA with 0.100 M NaOH, the st…

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 8. Which of the following indicators would be best to use to mark the endpoint of this titration? A) an indicator with Ka = 10–11 B) an indicator with Ka = 10–14 C) an indicator with Ka = 10–9 D) an indicator with Ka = 10–8 E) an indicator with Ka = 10–12