Question

1.8g of fructose `(C_(6)H_(12)O_(6))` is added to 2 kg of water. The freezing point of the solution is
A. `-1.86^(@)C`
B. `0.186^(@)C`
C. `-0.0186^(@)C`
D. `-0.0093^(@)C`

Answer 1

`DeltaT_(f) = K_(f) xx m = 1.86 xx (1.8)/(180) xx (1)/(2)`
`= 1.86 xx (1)/(200) = 0.0093^(@)`
It is to be below `0^(@)C :. DeltaT_(f) =- 0.0093^(@)C`