Question

Difference between molal elevation constant and molar elevation constant

Answer 1

Answer:

molal elevation constant is related to boiling point while as molar elevation constant is related to melting point.

Answer 2

Answer:

   Molal elevation constant:

• It can be written as; Δ Tb ∝ m; m represents the number of the moles of solute dissolved in a kg of solvent, or we can also say the molality.
• Now, Δ Tb = Kbm; here Kb is the molal elevation constant.
• Therefore, the unit of molal elevation constant is Kkgmol−1.

Molar elevation constant:

• Molar elevation constant can be defined as the elevation in boiling point produced when one mole of solute is dissolved in 1 kg i.e. 1000 g of the solvent.
• It is also known as the ebullioscopic constant.