A solution is formed by the combination of two liquids such as dichloromethane and chloroform. The partial…
A solution is formed by the combination of two liquids such as dichloromethane and chloroform. The partial pressures of dichloromethane and.chloroform in solution are 285.5 and $62.4 \mathrm{~mm} \mathrm{Hg}$ respectively. What is the total pressure of the solution?
$223.1 \mathrm{~mm} \mathrm{Hg}$
$347.9 \mathrm{~mm} \mathrm{Hg}$
$357.9 \mathrm{~mm} \mathrm{Hg}$
$337.9 \mathrm{~mm} \mathrm{Hg}$
Solution
$\mathrm{P}_{\text {total }}=\mathrm{x}_1 \mathrm{P}_1^{\circ}+\mathrm{x}_2 \mathrm{P}_2^{\circ}$
$\begin{aligned} & =\mathrm{P}_1+\mathrm{P}_2=285.5+62.4 \\ & =347.9 \mathrm{~mm} \mathrm{Hg} .\end{aligned}$
(as chloroform and dichloromethane form an ideal solution)