How is Boiling point considered as a colligative property.

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Solution

Colligative property is the property which depends on the relative amount of solute present in the pure solvent.If the relative amount of solute increases in the solvent the boiling pont also increases,so boiling point is colligative property.

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Similar questions

Q. Why does a solution containing non - volatile solute have higher boiling point than the pure solvent ? Why is elevation of boiling point a colligative property?

Q. The experimental values of colligative properties of many solutes in solution resembles calculated values of colligative properties.
However in some cases, the experimental values of colligative properties differ widely than those obtained by calculations. Such experimental values of colligative properties are known as abnormal values of colligative properties. The causes for abnormal values of colligative properties are:
(i) Dissociation of solute: It increases the colligative properties.
e.g.: Dissociation of

KCl, NaCl

etc. in

H_{2} O

.
(ii) Association of solute: It decreases the colligative properties.
e.g.: Dimerisation of acetic acid in benzene.

If the degree of dissociation of an electrolyte

A_{2} B_{3}

is 25% in a solvent, then:

KCl, NaCl

etc. in

H_{2} O

.
(ii) Association of solute: It decreases the colligative properties.
e.g.: Dimerisation of acetic acid in benzene.

One mole of

I_{2}

(solid. is added in

1 M

, 1 litre

KI

solution. Then,

the elevation in boiling point is explained as a colligative property of every solutions.but,for solutions showing positive deviation from raoult's law,the intermolecular attractive forces between solute-solvent molecules are weaker than those between solute- solute and solvent-solvent molecules.this can only result in a lowering of boiling point.how is this possible?

Q. Assertion (A): Elevation in boiling point is a colligative property.
Reason (R): Elevation in boiling point is directly proportional to molality.

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