Answer : The freezing point of a solution is,
Explanation :
First we have to calculate the Van't Hoff factor (i) for .
The dissociation of will be,
So, Van't Hoff factor = Number of solute particles = = 1 + 1 = 2
Now we have to calculate the freezing point of a solution.
Formula used for lowering in freezing point :
or,
where,
= change in freezing point
= temperature of solution = ?
= temperature of pure water =
= freezing point constant =
m = molality = 0.08500 m
i = Van't Hoff factor = 2
Now put all the given values in this formula, we get the freezing point of a solution.
Therefore, the freezing point of a solution is,