An acid with a Ka of 1 x 10-6 is titrated with NaOH. Roughly, what should the Ka of the indicator be?

Question

a. ) 10^-3

b. ) 10^-6

c. ) 10^-7

d. ) 10^-9

Answer 1

[Quick answer: You want the pKa of the indicator to be roughly equal to the pH of the solution.  Get an answer from that?]