Question

The freezing point of a `0.05` molal solution of a non-electrolyte in water is:
(`K_(f) = 1.86 "molality"^(-1)`)
A. `-1.86^(@)C`
B. `-0.93^(@) C`
C. `-0.093^(@)C`
D. `0.093^(@)C`

Answer 1

Correct Answer - C
`Delta T_(f)= 1.86 xx 0.05 = 0.093 (Delta T_(f) = K_(f) xx m)`
`:. T_(f) = 0 - 0.093 = -0.093^(@)C`