Write all possible quilibrium equations for KHP dissovled in water and then write the quilibrium constanst expressions for the equation.

Answer 1

This should get you started.
KHP + HOH ==> K^+(aq) + HP^-(aq)
HP^- + H20 ==> H3O^+ + P^2-
k2 = (H^+)(P^2-)/(HP^-)