Colligative properties i.e., the properties of solution which depends upon the number pf aprticles
Channel: Doubtnut
Date: 2020-08-02

Colligative properties i.e., the properties of solution which depends upon the number pf aprticles present in solution are osmotic pressure, depression in freezing point, elevation in boiling point and lowering in vapour pressure. Experimental values of colligative properties for electroetically because electrolytes dissociates to furnish more ions in solution. On the other hand experimentally obtained values of colligative properties for associating  nature of solute ate lower than those obtained theoretically. The ratio of experimantal colligative properties to theoretical colligative properties is called as van't Hoff factor `(i)`.   For `1M` solution of `HA` having `alpha gt 0.05`, the dissociation constant `K_(a)` in terms of van't Hoff factor `(i) can be written as :