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An aqueous solution of a non-volatile so...

An aqueous solution of a non-volatile solute boils at `100.17^(@)C`. At what temperature will the solution freeze? (Given: `K_(b) = 0.512` and `K_(f) = 1.86`)

Text Solution

Verified by Experts

We know that
`DeltaT_(b)=MolalityxxK_(b)`
`0.17=Molalityxx0.512`
`"Molality of the solution" = (0.17)/(0.512)(m)`
Let depression in frezzing point br `DeltaT_(f)`
`DeltaT_(b)= "Molality" xxK_(b)`
`= (0.17)/(5.12)xx1.86 = 0.62^(@)C`
Thus, the freezing point of the solution is
`0.00 - 0.62 = -0.62^(@)C`
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