Mathematics Quizzes Ionic Equilibria Test

Question:
The dissociation constant of acetic acid is 1.8 x 10^-5. . 0.5M sodium acetate and 5M acetic acid solutions are mixed. What will be the pH of the mixture (log1.8 = 0.20)

Option A):
3.8
Option B):
3.6
Option C):
5.9
Option D):
5.5

Correct Answer is Option A):
3.8