What Is the PH of a Solution Made by Mixing $\mathrm { CH } _ { 3 } \mathrm { COOH }$

Multiple Choice

What is the pH of a solution made by mixing 30.00 mL of 0.10 mol L^-1 acetic acid (CH₃COOH) with 50.00 mL of 0.100 mol L^-1 KOH? Assume that the volumes of the solutions are additive.K_a = 1.8 × 10^-5 for $\mathrm { CH } _ { 3 } \mathrm { COOH }$

A) 8.26
B) 9.26
C) 11.13
D) 12.40