Question

Calculate the
depression in freezing point of a 0.2 molal
solution if kf for water is 1.86 K kg mol

Answer 1

Explanation:

Answer : The freezing point of 0.1 molal solution of a substance is 272.814 K.

Solution : Given,

Molality = 0.1 molal

The formula used for depression in freezing point is,

where,

= freezing point of pure solvent = 273 K

= freezing point of solution

m = molality

= molal depression constant

Now put all the given values in this formula, we get

Therefore, the freezing point of 0.1 molal solution of a substance is 272.814 K.