Define Molal Elevation Constant and Molal Depression Constant

Answer:

The molal elevation constant is the increase in boiling point caused by dissolving one mole of solute in one kilogram of solvent (1000 g). The ebullioscopic constant is another name for it.

When the molality of the solution is unity, i.e. 1 mole of the solute is dissolved in 1 kilogram of the solvent, the constant is defined as the decrease in freezing point.