The vapour pressure of the solution of two liquids AP- - 80 mm and Bp- - 120 mm is found to be 100 mm when xA - 0-4- The result shows that -

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Standard XII

Chemistry

Ideal Solutions

The vapour pr...

Question

The vapour pressure of the solution of two liquids $A (P^{\circ} = 80 m m)$ and $B (p^{\circ} = 120 m m)$ is found to be $100 m m$ when $x_{A} = 0.4$ . The result shows that :

Solution exhibits ideal behaviour

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Solution shows positive deviations

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Solution shows negative deviations

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Solution will show positive deviations for lower concentration and negative deviations for higher concentrations

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Solution

The correct option is D Solution will show positive deviations for lower concentration and negative deviations for higher concentrations
$P_{A}^{o} = 80 m m$
$P_{B}^{o} = 120 m m$
$x_{A} = 0.4 x_{B} = 0.6$
$P = 80 \times 0.4 + 120 \times 0.6$
$= 104 m m$
observed vapour pressure < calculated vapour pressure
(solution shows negative deviation

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The vapour pressure of the solution of two liquids A(P∘=80 mm) and B(p∘=120 mm) is found to be 100 mm when xA=0.4. The result shows that :

The correct option is D Solution will show positive deviations for lower concentration and negative deviations for higher concentrationsPoA=80mmPoB=120mmxA=0.4xB=0.6P=80×0.4+120×0.6 =104mmobserved vapour pressure < calculated vapour pressure(solution shows negative deviation

The vapour pressure of the solution of two liquids $A (P^{\circ} = 80 m m)$ and $B (p^{\circ} = 120 m m)$ is found to be $100 m m$ when $x_{A} = 0.4$ . The result shows that :