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An aqueous solution freezes at 272.4 K w...

An aqueous solution freezes at 272.4 K while pure water freezes at 273 K. Given `K_(f)=1.86 K kg "mol"^(-1)`,`K_(b)=0.512 K kg "mol"^(-1)` and vapour pressure of water at 298 K = 23.756 mm Hg. Determine the following.
Depression in freezing point of solution

A

`0.68`

B

`0.43`

C

`0.5989`

D

`0.326`

Text Solution

Verified by Experts

The correct Answer is:
C
Depression in freezing point `(DeltaT_(f))`
`DeltaT_(f) = K_(f)m`
`=1.86 xx 0.322`
`=0.5989 K`
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