Hydrolysis Constant

• The equilibrium constant, Kh, for hydrolysis is just a Ka or Kb, depending on the type of hydrolysis.

• NH4+ + H2O ? NH3 + H3O+

  Kh = Ka of NH4+ = Kw/Kb of NH3
  

• F- + H2O ? HF + OH-

  Kh = Kb of F- = Kw/Ka of HF
  

• Calculate the pH of a solution the same as for any weak acid or weak base, using Kh for the equilibrium constant.

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