InterviewSolution
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InterviewSolution
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why ideal solution don't form azeotrope |
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Answer» his question is a little like asking why parallel lines don’t meet: Because if they met, they wouldn’t be called parallel. ‘Ideal solutions’, better ‘ideal mixtures of liquids’, are mixtures where the intermolecular forces in the liquid phase are exactly the same between molecules of the same substance as between molecules of different substances. They don’t exist in reality, but are approximated if the substances are chemically very similar, like for example 1-butanol and 2-butanol. An ideal mixture would obey Raoult’s law ( → Raoult's law - Wikipedia), which, in simple language, states that the Total Vapour Pressure of the mixture is a rectilinear function of the concentration ratio of the ingredients. Deviation from ‘ideality’ means deviation from the values corresponding to Raoult’s law. If the deviation is such that minima or maxima in the vapour pressure of the mixture are formed, then the mixture is an azeotrope at those concentrations. |
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