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  • I have a doubt, kindly clarify. If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be :

If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be :

  • Option 1)

    Doubled

  • Option 2)

    Halved

  • Option 3)

    Tripled

  • Option 4)

    Unchanged

 

Answers (1)

As learnt in concept

Mathematical Expression of Depression in Freezing point -

\Delta T_{f}= K_{f}\: m
 

- wherein

m = molarity of solvent 

K_{f} = cryoscopic  constant

    molal depress const

Units = \frac{K-K_{g}}{mole}

 

 Kf, molal depression constant is independent of molality of the solution because it is the inherent property of the solvent


Option 1)

Doubled

This option is incorrect

Option 2)

Halved

This option is incorrect

Option 3)

Tripled

This option is incorrect

Option 4)

Unchanged

This option is correct

Posted by

Vakul

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