Chemistry - Liquid Solution Question with Solution | TestHub

$\begin{array}{rl}& \frac{{\mathrm{P}}^{\circ }-{\mathrm{P}}_{\mathrm{s}}}{{\mathrm{P}}^{\circ }}={\mathrm{X}}_{\text{solute }}=\frac{{\mathrm{n}}_{\text{solute }}}{{\mathrm{n}}_{\text{solute }}+{\mathrm{n}}_{\text{solvent }}}\\ & \text{ Mass of water }=1.8\times 10^{-2}\mathrm{kg}\\ & =1.8\times 10^{-2}\times 1000\mathrm{g}=18\mathrm{g}\\ & \text{ Moles of water (solvent) }=\frac{18}{18}=1\\ & \frac{24-{\mathrm{P}}_{\mathrm{s}}}{24}=\frac{0.1}{0.1+1}=\frac{0.1}{1.1}\\ & \frac{24-{\mathrm{P}}_{\mathrm{s}}}{24}=\frac{1}{11}\\ & {\mathrm{P}}_{\mathrm{s}}=24-\frac{24}{11}=21.8\mathrm{mm}\mathrm{Hg}.\end{array}$