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Normal freezing point of a solvent is 5^...

Normal freezing point of a solvent is `5^(@)C` A 0.5 nilal solution of urea in the this solvent causes freezing point depression of two degrees. Calculate the molal depression constant.

Text Solution

Verified by Experts

The correct Answer is:
4 `km^(-1)`
`DeltaT_(f)=2^(@)C=2" K Molality",m=0.5 m, DeltaT_(f)=K_(f)m`
`K_(f)=(DeltaT_(f))/m=(2K)/(0.5m)=4Km^(-1)`
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