\(\begin{array}{l}
{n_{{I_2}}} = \dfrac{{76,2}}{{254}} = 0,3\left( {mol} \right)\\
C{l_2} + 2KI \to 2KCl + {I_2}\,\,\,\,\,\,\,\,\,\,(1)\\
Theo\,\,(1)\,\,\,:\,\,\,\,\,{n_{KI}} = 2.{n_{{I_2}}} = 2.0,3 = 0,6\left( {mol} \right)\\
{C_M} = \dfrac{{0,6}}{{0,2}} = 3\left( {mol/l} \right)
\end{array}\)
