Question

Molarity of a solution change with temperature but molality does not explain

Answer 1

molarity is no of moles of solute in 1 l of solution ( solute+ solvent) here volume of solution is in litre. and volume expands and the temperature rises while molality is the no moles of solute dissloved in mass of 1 kg of solvent.

and mass does not depends upon temperature. hence molarity depends on temperature while molality does not.

Answer 2

Molality does not change as it is dependent on mass which does not change with temperature.

• Because volume fluctuates with temperature, molarity is a function of both volume and temperature.
• Regardless of temperature, molality rest on the solvent mass and the solute. It is the total quantity of moles of the dispersed solute molecules per kg of solvent.
• It is the number of moles per litre of the solution.  Since it depends on capacity and rises as temperature increases, it is inversely linked to temperature.
• As the temperature rises, which likewise raises the capacity, the moles per litre will decrease. Molarity reduces when temperature increases as a result.

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