Question

Which of the folllowing is dependent on temperature?

• A. Molality
• B. Molarity
• C. Mole fraction
• D. Weight percentage

Answer 1

The correct option is B Molarity

The quantity that depends on volume varies with temperature change.
$\left(a\right)$ Molality $=\frac{n_{solute}}{W_{solvent}}\times 1000$
i.e. it is independent of volume. So, will not change with temperature change.

$\left(b\right)$ Molarity $=\frac{n_{solute}}{V_{solution}}\times 1000$
i.e. it is dependent on volume. So, will change with temperature change.

$\left(c\right)$ Mole fraction $=\frac{n_A}{n_A+n_B}$
i.e. it is independent of volume. So, will not change with temperature change.

$\left(d\right)$ Weight percentage $=\frac{w_{solute}}{W_{solution}}\times 100$
i.e. it is independent of volume. So, will not change with temperature change.

Hence, the correct answer is option (b).