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Question
State Raoult’s law.
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Solution 1
Raoult’s law states that the partial vapour pressure of any volatile component of a solution is equal to the vapour pressure of the pure component multiplied by its mole fraction in the solution.
Solution 2
For a solution of volatile liquids, the partial vapour pressure of each component in the solution at a particular temperature is equal to the product of the vapour pressure of the component in the pure state and its mole fraction in the solution.
Mathematically, for a binary solution:
\[\ce{P_A = P{^{\circ}_{A}}\chi_A}\] and
\[\ce{P_B = P{^{\circ}_{B}}\chi_B}\]
The total vapour pressure is:
\[\ce{P_{total} = P_A + P_B = P{^{\circ}_{A}}\chi_A + P{^{\circ}_{B}}\chi_B}\]
Notes
Students can refer to the provided solutions based on their preferred marks.
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