Answer:
Aniline
undergoes dissociation in aqueous medium as follows:
\[\underset{{{t}_{\begin{smallmatrix}
0 \\
{{t}_{eq}}
\end{smallmatrix}}}}{\overset{{}}{\mathop{{}}}}\,\,\,\,\,\underset{\begin{smallmatrix}
C \\
C-C\alpha
\end{smallmatrix}}{\mathop{{{C}_{6}}{{H}_{5}}N{{H}_{2}}}}\,+HOH\rightleftharpoons
\underset{\begin{smallmatrix}
0 \\
C\alpha
\end{smallmatrix}}{\mathop{{{C}_{6}}{{H}_{5}}NH_{3}^{+}}}\,+\underset{\begin{smallmatrix}
0 \\
C\alpha
\end{smallmatrix}}{\mathop{O{{H}^{-}}}}\,\]
Dissociation constant (\[{{K}_{b}}\]) of aniline may be
calculated as:
\[{{K}_{b}}=\frac{[{{C}_{6}}{{H}_{5}}N_{3}^{+}][O{{H}^{-}}]}{[{{C}_{6}}{{H}_{5}}N{{H}_{2}}]}=\frac{C\alpha
\times C\alpha }{C-C\alpha }\]
\[=\frac{C{{\alpha
}^{2}}}{1-\alpha }\approx C{{\alpha }^{2}}\] \[(\because
\alpha
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