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Liquids in Liquids

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Question

does any solution obey raoults law over entire range of solution does it not deviate even a little bit from it.
regards himanshu.

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Solution

Dear Student,
It will obey Raoult's law up to the range where forces of attraction exists between solute and solvent particles. If there will be no interaction between them it will not obey this law.

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Q. CASE1: Read the passage given below and answer the following question.

The solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.
Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes.

Which of the following solutions show negative deviation from Raoult’s law?
[0.77 Mark]

Q. CASE 1: Read the passage given below and answer the following question

The solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.
Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes.

Incorrect thermodynamic relation for ideal solution is:
[0.77 Mark]

Q. What are the conditions for an ideal solution which obeys Raoult's law over the entire range of concentration?

Q. A solution of

C H C l_{3} + C H_{3} C O C H_{3}

shows negative deviation from Raoults law.

Q. Assertion :If one component of a solution obeys Raoult's law over a certain range of composition, the other component will not obey Henry's law in that range. Reason: Raoult's law is a special case of Henry's law.

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