How many pairs of enantiomers are possible for following complex compound, $[M \,(AB)\, (CD) \,ef]^{n\,±}$ (where $AB,\,CD-$ Unsymmetrical bidentate ligand, $e$, $f-$ monodentate ligands)
→The freezing point depression constant for water is $-\,1.86\,^o \,C\, m^{-1}.$ If $5.00 \,g \,Na_2SO_4$ is dissolved in $45.0\, g\, H_2O,$ the freezing point is changed by $-\,3.82\,^o C.$ Calculate the van't Hofffactor for $Na_2SO_4 .$
→$\begin{array}{*{20}{c}}
{CH = O} \\
{\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,{{(CH - OH)}_4}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,\,\,C{H_2} - OH}
\end{array}$ $\xrightarrow{{B{r_2}/{H_2}O}}$ $P; P$ is
→