The molality of a solution does not change with temperature, whereas the molarity does vary with temperature.

Question

Quizplus · Accepted Answer

Molality is defined as the number of moles of solute per kilogram of solvent. As it is based on mass of solvent, it does not depend on temperature. On the other hand, molarity is defined as the number of moles of solute per liter of solution, which changes with temperature due to the volume expansion or contraction of the solution.

The Molality of a Solution Does Not Change with Temperature