The Equilibrium Constant for the Reaction C₆H₅COOH(aq)+ CH₃COO^-(aq)

Multiple Choice

The equilibrium constant for the reaction C₆H₅COOH(aq) + CH₃COO^-(aq)
C₆H₅COO^-(aq) + CH₃COOH(aq)
Is 3.6 at 25°C.If K_a for CH₃COOH is 1.8 × 10^-5, what is the acid dissociation constant for C₆H₅COOH?

A) 5.0 × 10^-6
B) 6.5 × 10^-5
C) 2.3 × 10^-4
D) 8.3 × 10^-5
E) 5.6 × 10^-6