Explain the terms ideal and non-ideal solutions in the light of forces

1.	Explain the terms ideal and non-ideal solutions in the light of forces of interactions operating between molecules in liquid solutions.
Answer» △_mixH = 0, △_mix V= 0 A—B interactions.-- A—A interactions and B—B interactions. Non-ideal solutions: When a solution does not obey Raoult's law over the entire range of concentration, it is called non-ideal solution. Positive deviations: Vapour pressure of such solutions shows higher value than the predicted value. △_mix^H = +ve △_mix^V= +ve A—B interactions <A—A and B—B interactions. Negative deviation: Vapour pressure of such solutions shows lower value than expected. △_mixH = —ve △_mixV = —ve A—B interactions > A—A and B—B interactions. Refer to page 45 of NCERT textbook for Class XII.

Explain the terms ideal and non-ideal solutions in the light of forces of interactions operating between molecules in liquid solutions.

Answer»

△_mixH = 0, △_mix V= 0
A—B interactions.-- A—A interactions and B—B interactions.

Non-ideal solutions: When a solution does not obey Raoult's law over the entire range of concentration, it is called non-ideal solution.

Positive deviations: Vapour pressure of such solutions shows higher value than the predicted value.

△_mix^H = +ve △_mix^V= +ve

A—B interactions <A—A and B—B interactions.

Negative deviation: Vapour pressure of such solutions shows lower value than expected.

△_mixH = —ve △_mixV = —ve

A—B interactions > A—A and B—B interactions.

Refer to page 45 of NCERT textbook for Class XII.

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