205. State Raoult’s layer for a binary solution containing volatile components.

Answer:

Raoult's law states that for a solution of volatile liquid, the partial vapour pressure of each component in the solution is directly proportional to its mole fraction.
Thus if there is solution of two liquid component 1and 2, then
for component 1,
      
      $$\begin{gathered} {\mathrm{p}}_{1 }\propto {\mathrm{x}}_1 \\ \mathrm{and} \\ {\mathrm{p}}_1 = {\mathrm{p}}_1^0{\mathrm{x}}_1 \\ \mathrm{For} \mathrm{component} 2, \\ {\mathrm{p}}_2 = {\mathrm{p}}_2^0{\mathrm{x}}_2 \end{gathered}$$

Where 
p₁p₂ = partial vapour pressure of two volatile component in solution 1 and 2 
${\mathrm{p}}_1^0 \mathrm{p}{ }_2^0$ = vapour pressure of pure component1 and 2
x₁x₂ = mole fraction of component.