LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Solutions by (47.9k points)
closed by

How would you determine the molar mass from osmotic pressure.

1 Answer

+1 vote
by (46.8k points)
selected by
Best answer

According to van’t Hoff equation 

π = CRT

C = n / V

Here n = number of moles of solute dissolved in ‘V’ litre of the solution. 

π = \(\frac{n}{V}\).RT = πV = nRT

If the solution is prepared by dissolving WB of the non-volatile solute in WA g of solvent, then the number of moles of ‘n’ is



MB = molar mass of the solute 

Substituting n value, we get

From the above equation, we can calculate the molar mass of the solute.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.