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Grade 12th passPhysical Chemistry

Non-ideal solutions exhibit either positive or negative deviations from Raoult’s law. What are these deviations and why are they caused? Explain with one example for each type...

Profile image of Harshit Singh
5 Years agoGrade 12th pass
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1 Answer

Profile image of Pawan Prajapati
5 Years ago
Answer:
Non-ideal solutions exhibit Negative deviation from Raoult’s law : For any composition of the non-ideal solution, the partial vapour pressure of each component and total vapour pressure of the solution is less than expected from Raoult’s law. Such solutions show negative deviation.
Example : Mixture of CHCl3 and acetone.

Non-ideal solutions show positive deviations from Raoult’s law on mixing of two volatile components of the solution.
Example : Mixture of acetone and benzene solutions show positive deviation.

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