The osmotic of a solution of a synthentic polyisobutylene in benzene was determined at 25oC A sample containing - Chemistry - Solutions

Question

The osmotic of a solution of a synthentic polyisobutylene in
benzene was determined at 25oC A sample containing 0 20
g of solute/100cm3 of solution developed a rise of 2 4
mm at osmotic equilibrium The density of the solution was 0 88
g/cm3 What is the molecular waight of the
polyisobutylene

na · Accepted Answer

Osmotic pressure=h*density*g

Osmotic pressure=2 4*0 88*9 8=20 7 Pa

Osmotic pressure=CRT

C=concentration in molarity

20 7=C*8 314*298

C=0 0084M

C=(0 2/molecular mass of the
polyisobutylene )1000/vol of solution

Molecular mass the polyisobutylene =0 2*1000/100*0 0084

Molecular mass the polyisobutylene=238gmol-1

The osmotic of a solution of a synthentic polyisobutylene in benzene was determined at 25oC . A sample containing 0.20 g of solute/100cm3 of solution developed a rise of 2.4 mm at osmotic equilibrium . The density of the solution was 0.88 g/cm3 . What is the molecular waight of the polyisobutylene.