QUESTION 25
± Weak Base Calculations
Many common weak bases are derivatives of NH3, where one or more
of the hydrogen atoms have been replaced by another substituent.
Such reactions can be generically symbolized as
NX3(aq)+H2O(l)⇌HNX3+(aq)+OH−(aq)
where NX3 is the base and HNX3+ is the conjugate acid. The
equilibrium-constant expression for this reaction is
Kb=[HNX3+][OH−][NX3]
where Kb is the base ionization constant. The extent of
ionization, and thus the strength of the base, increases as the
value of Kb increases....