Question

What is the molal elevation constant, K_b?

Answer 1

The molal elevation constant (K_b), also known as the ebullioscopic constant, is the elevation in boiling point of a solvent when 1 mole of a non-volatile solute is dissolved in 1 kg of the solvent.

`K_b = (Delta T_b)/m`

Where,

ΔT_b​ = Elevation in boiling point

m = Molality of the solution

The units of molal elevation constant, K_b is K kg mol⁻¹.