$Fe ^{3+}= III ^{ rd } \text { Group }$
(આપેલ : $pK _{ b }\left( NH _3\right)=4.74,NH _3$ નું મોલર દળ $=17\, g\, mol ^{-1},NH _4 Cl$નું મોલર દળ $= 53.5\, g\, mol ^{-1}$
$\begin{array}{*{20}{c}}
{C{H_3}C{H_2}OH{\text{ }} + {\text{ }}{H_3}{O^ + }\, \to \,C{H_3}C{H_2} - {O^ + } - H\, + {H_2}O} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,H\,\,\,\,\,\,}
\end{array}$