Question

A solution containing 6.8 g of non-ionic solute in 100g of water was found to freeze at `-0.93^(@)C`. If `K_(f)` for water is 1.86, the mol. Mass of solute is
A. 13.6
B. 34
C. 68
D. 136

Answer 1

Correct Answer - D
`M = (K_(f) xx w_(B) xx 1000)/(DeltaT_(f) xx w_(A)) = (1.86 xx 6.8 xx 1000)/(0.93 xx 100) = 136`