1.

A solution of sucross (molar mass = 342 g "mol"^(-1)) has been prepared by dissolving 68.4 g of sucrose in one kg of water. K_(f) for water is "1.86 K kg mol"^(-1) and vapour pressure of water at 298 K is 0.024 atm. The freezing point of the solution will be

Answer»

`-0.684^(@)C`
`-0.342^(@)C`
`-0.372^(@)C`
`-0.186^(@)C`

Solution :`DeltaT_(f)=K_(f)xxm=1.86xx(68.4)/(342)=0.372^(@)`
`THEREFORE"Freezing POINT of the solution "=-0.372^(@)C`


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