Question

Of the following terms used for denoting the concentration of a solution, the one which does not get affected by temperature is:

Options

• Molarity

• Molality

• Normality

• Formality

Answer 1

Molality

Explanation:

Molality is defined as the number of moles of solute per kilogram of solvent, and since mass does not change with temperature, molality remains unaffected. In contrast, molarity, normality, and formality are based on the volume of solution, which varies with temperature due to expansion or contraction. Hence, molality is the only concentration term not affected by temperature.