Question

A 0:1 m solution of K2S04 in water has
freezing point of -4.3°c. what is there
of Van't Hoff Factor It Kf for water
Is 1.86 K. Kgmolpower-1

Answer 1

Answer:

See below.

Explanation:

We are given a 0.1 molal solution of K2SO4 and its freezing point. Using the equation,

$\Delta T_{f}=iK_{f}m$

The change in freezing point of solvent is ( 0 - ( - 4.3 ) ) = 4.3 Celsius.

$\begin{aligned}4.3=i\left( 1.86\right) \left( 0.1\right) \\ i=2\end{aligned}$

Note: The answer will be 2 and not 2.311 by rules of significant figures.