Chemistry - Liquid Solution Question with Solution | TestHub

Osmotic pressure$\mathrm{\pi }=\text{iCRT}$(i is  Van't  Hoff factor, C is concentration)

$\mathrm{\pi }=\mathrm{iC}$at same temperature.

$$\begin{gathered} {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}=1\mathrm{x}0.5=0.5 \\ {\mathrm{Mg}}_3({\mathrm{PO}}_4{)}_2=5\mathrm{x}0.1=0.5 \\ \mathrm{KBr}=2\mathrm{x}0.25=0.5 \\ {\mathrm{Na}}_3{\mathrm{PO}}_4=4\mathrm{x}0.125=0.5 \end{gathered}$$

The solutions are isotonic as they have the same osmotic pressure.