What is the freezing point of 2.47 m solution of Napthalene in Benzene? Kf= 5.12° C/ms The freezing point og Benzene is 5.5°C

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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What is the freezing point of 2.47 m solution of Napthalene in Benzene? Kf= 5.12° C/ms The freezing point og Benzene is 5.5°C
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Step 1

Solution is made up of two components which are solute and solvent. Solute is present in the minor amount and solvent is present in the major amount. Here solute is naphthalene and solvent is benzene.

Step 2

Write the expression of depression in the freezing point of a solution.

T=Kfm

where m is the molality, Kf is the molal depression constant and T is the depression in freezing point.

The value of molal depression constant is 5.12o C/m.

Molality of benzene is 2.47 m.

Substitute 5.12o C/m for Kf and 2.47 m for m to calculate the depression in freezing point of solution.

T=Kfm

So, the depression in freezing point of solution is 12.65o C.

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