A way of describing solution composition. It is the ratio of the number of moles of one component of a mixture to the total number of moles of all components.
Molality

The ratio of the number of moles of solute to the mass of the solvent in kilograms.
Molality does not change with the solution's temperature, unlike molarity which can change due to volume changes.
Molarity measures the number of moles of solute per liter of solution, while molality measures the number of moles of solute per kilogram of solvent.
