Textbook problem 6D.3

[005917072]

For part a of this problem, I got a Ka of 0.1 and a pKa of 0.96, but the answer key says the Ka should be 0.09 and the pKa should be 1.0. I just wanted to know if this was just due to rounding differences, or if I did something incorrect to get that answer?

[Mell Mercado 3F]

Hey! So I just used 0.06 rather than 0.063 I was having the same problem until I used 0.06 and it all should equal what the answer key says hope this helps!