What is the difference between molarity and molality?
Molality is moles of solute per kilogram of solvent. Molarity is moles of solute per
liter of solution. Molalities are more convenient than molarities in experiments that
involve significant temperature changes. Because the volume of a solution increases when
its temperature increases, heating makes the solutions molarity go down- but the molality, which is based on masses rather than volumes, remains unchanged.