Question

Investigating changes in colligative properties involves the measurement of a solution's concentration in molality instead of molarity because

Answer 1

The mass does not change with temperature, whereas the volume of a substance does change when the temperature changes.

Answer 2

Step-by-step explanation:

Molality is defined as the number of moles of solute per kg of solution. That is, molality depends on the mass.

Whereas molarity is defined as the number of moles per liter of solution. That is, molarity depends on the volume of solution.

Also, when there is change in temperature then volume of solution changes but mass does not change.

Thus we can conclude that investigating changes in colligative properties involves the measurement of a solution's concentration in molality instead of molarity because mass does not change whereas volume does change.