Question

Which of the following aqueous solutions has the highest boiling point?
A) $0.1{\text{ }}M$ $KN{O_3}$
B) $0.1{\text{ }}M$ $N{a_3}P{O_4}$
C) $0.1{\text{ }}M$ $BaC{l_2}$
D) $0.1{\text{ }}M$ ${K_2}S{O_4}$

Answer 1

The boiling factor of a substance is the temperature at which the vapor strain of a liquid equals the strain surrounding the liquid and the liquid adjustments right into a vapor. The boiling factor of a liquid varies relying upon the encircling environmental strain. A liquid in a partial vacuum has a decrease boiling factor than whilst that liquid is at atmospheric strain.

Complete Answer:
Boiling factor elevation relies upon the solvent, of course, however, we are assuming water, and upon the attention of the solute and the number of debris into which the solute breaks. Colligative residences like boiling factor elevation depend upon the whole quantity of debris in the solution. The solvent used right here is water. So elevation in boiling factor might be above a boiling factor of water for all answers.
$\Delta T = i \times Kb \times m$ , in which i = vant Hoff's factor, Kb = boiling factor elevation constant, m = molality
Higher $\Delta T$ can have a better boiling factor.
For $0.1{\text{ }}M$ $KN{O_3}$ $\left( i \right) = \left( {1 + \left( {n - 1} \right)\alpha } \right) = 2$ (α for salt is $1$ )
Similarly for $0.1{\text{ }}M$ $BaC{l_2}$ $\left( i \right) = 3$ (α for salt is $1$ )
For $0.1{\text{ }}M$ $N{a_3}P{O_4}$ $\left( i \right) = 4$ (α for salt is $1$ )
For $0.1{\text{ }}M$ ${K_2}S{O_4}$ $\left( i \right) = 3$ (α for salt is $1$ )
Thus, $N{a_3}P{O_4}$has the best boiling factor.

Option B is the correct answer.

Note:
A saturated liquid includes as lots thermal power as it may without boiling (or conversely a saturated vapor includes as little thermal power as it may without condensing).
Saturation temperature means boiling factor. The saturation temperature is the temperature for a corresponding saturation strain at which a liquid boils into its vapor segment. The liquid may be stated to be saturated with thermal power. Any addition of thermal power consequences in a segment transition.