In the given figure, with passage of time, the concentration is expected to change as
 

effective conc. of  $NaClsol=0.1\times 2=0.2M$
effective conc. of   $BaC{l}_2\text{\hspace{0.17em}\hspace{0.17em}soln}=0.05\times 3=0.15M$
 $\therefore {\pi }_{Nacl}>{\pi }_{Bac{l}_2}$
$\Rightarrow$ Solvent flows from  $BaC{l}_2$  to  $NaCl$  sol
$\Rightarrow$  Conc.  $BaC{l}_2\uparrow$ & Conc. of  $NaCl\downarrow$