A 0.1 M solution of a weak electrolyte, , has a freezing point depression of
. The van't Hoff factor, i, for the electrolyte is 2. Calculate the degree of dissociation, α.
0.60
0.50
0.40
0.30
The freezing point depression, , is given by the formula:
Here, i is the van't Hoff factor, which is 2 for the electrolyte .
For the solvent, molality,
We know that the degree of dissociation, , for a weak electrolyte can be calculated as:
Substituting the given values, we get: