Question

State Boyle-van’t Hoff law.

Answer 1

According to Boyle-van’t Hoff law, the osmotic pressure of a dilute solution is directly proportional to its concentration, provided temperature remains constant.

Let π be the osmotic pressure and C the concentration of a dilute solution. According to this law,

π ∝ C (at constant temperature)    ...(i)

If the concentration of the solution is expressed in moles per litre and V is the volume containing one mole of the solute, C = 1/V. Therefore, equation (i) can be written as

`pi prop 1/V` (at constant temperature)    ...(ii)

This relationship is similar to Boyle's law for gases and is known as Boyle-van’t Hoff law.