question_answer

(i) What is osmotic pressure and how is it related with the molecular mass of the non-volatile solution?   (ii) What is the advantage of osmotic pressure method over boiling point elevation method for determining molecular masses?  

Answer:

(i) The driving force responsible for the process of osmosis is called osmotic process.                Relation between osmotic pressure and molecular masses of solute                                           where, π = Osmotic pressure M = Molar mass of solute  (ii) (a) Osmotic pressure method gives large value for even small amount of solute.   (b) This experiment is performed at normal temperature hence no heating or cooling is required.