Question

Why molality is preferred over normality in expressing the concentration of a solution

Answer 1

Hey there,

Molarity is no. of moles of solute per unit Mass of solvent ,
and Normality is no. of gram equivalent of solute per unit volume of solution.

hence when we will increase the temperature there will no effect on Molality because it consist of mass And mass is considered constant at all temperature but if we talk about Normality it will change on changing the temperature as there is a need of volume. Hence molality is preferred.