Question

Why is osmotic pressure of of 1m kcl higher than 1 m yrea soln?

Answer 1

$KCl$ can dissociate into $K^+$ and $Cl^-$ ions when dissolved in water which doubles their concentration but Urea cannot dissociate into water. As Osmotic Pressure is a colligative property, it depends upon the number of particles. Hence, Osmotic Pressure of Potassium Chloride is more than Urea