The Equilibrium Expression for the Hydrolysis of a Weak Base

Multiple Choice

The equilibrium expression for the hydrolysis of a weak base, A^-, in water is:

A) K_b = [A^-]/[OH^-][H₃O⁺]
B) K_b = [OH^-][H₃O⁺]/[A^-]
C) K_b = [OH^-][HA]/[A^-]
D) K_b = [OH^-][A^-]/[HA]
E) K_b = [OH^-][HA]/[A^-][H₃O⁺]