Write two differences between ideal and non-ideal solutions.

Ideal solutions : An ideal solution is the solution which obeys Raoult's law perfectly over entire range of concentration and temperature and during its formation there is no change in its enthalpy and volume. Such solutions are formed by mixing the two components which are identical in molecular size, in structure and have almost identical intermolecualr forces. Examples of ideal solution:- Chlorobenzene and bromobenzene; Benzene and toluene; Ethyl bromide and ethyl iodide. Non-ideal solutions : Those solutions which do not obey Rault's law are called non-ideal solutions. Non ideal solutions are formed when the components differ much in their structures and polarities. Non ideal solutions show either positive or negative deviations from Rault's law. Examples of non-ideal solution :- Ethanol and cyclohexane; Acetone and benzene; Water and methanol.

E M B I B E

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 37

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12th West Bengal Board

IMPORTANT

Earn 100

What is Van't Hoff factor? What possible values can it have if the solute molecules undergo association or dissociation?

Important Questions on Solutions

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12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 38

Show graphically that the freezing point of a liquid will be depressed when a non-volatile solute is dissolved in it.

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12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 39

Show graphically how the vapour pressures of a solvent and a solution in it of non-volatile solute change with temperature. Show on this graph the boiling points of the solvent and the solution. Which is higher and why?

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12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 40

Why do we get abnormal molecular masses of the substances using colligative properties of solutions only sometimes? What are the natures of these abnormalities?

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12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 1

What role does the molecular interactions play in a solution of alcohol and water?

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12th West Bengal Board

IMPORTANT

NEW SYSTEMATIC MODERN CHEMISTRY>Chapter 2 - Solutions>REVIEW EXERCISES>Q 1

Why do gases always tend to be less soluble in liquids as the temperature is raised?

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12th West Bengal Board