Question

What is the equilibrium constant expression for the following reaction:
C5H5NH(aq) + H2O(l) ⇔ C5H5NH2+(aq) + OH-(aq)
Choose from the list below and enter the letters in alphabetical order. (e.g. For an equilibrium constant of [OH-]-1eq[H2O]eq enter AH.)
A. [H2O]eq B. [C5H5NH]eq
C. [C5H5NH2+]eq D. [OH-]eq
E. [H2O]-1eq F. [C5H5NH]-1eq
G. [C5H5NH2+]-1eq H. [OH-]-1eq