The degree to which a weak base dissociates is given by the
base-ionization constant, Kb. For the generic
weak base, B
this constant is given by
Strong bases will have a higher Kb value. Similarly,
strong bases will have a higher percent ionization
Percent ionization=[OH−] equilibrium[B] initial×100%
Strong bases, for which Kb is very large, ionize
completely (100%). For weak bases, the percent ionization changes
with concentration. The more dilute the solution, the greater the
Ammonia, NH3, is a weak base with a Kb value of
What is the pH of a 0.185 M ammonia solution?
Express your answer numerically to two decimal places.
What is the percent ionization of ammonia at this
Express your answer with the appropriate units.
% ionization =