A solution of of a non-volatile solute in
of water was found to boil at
. What is the elevation in boiling point of the solution? (Molar mass of water =
, Kb of water =
)
The elevation in boiling point can be calculated using the formula:
where i is the van't Hoff factor, is the molal boiling point elevation constant of the solvent, and m is the molality of the solution.
Since the solute is non-volatile, its van't Hoff factor is 1. The molality of the solution can be calculated as follows:
Substituting the values in the formula, we get:
We can now solve for using the boiling point elevation observed:
Finally, we can calculate the elevation in boiling point:
Therefore, the correct option isc)
Note: The molar mass of the solute is not required to solve this problem.