Question

Osmotic pressure method is the most useful method for determining the molecular weight of macromolecules. The hydrostatic pressure develop as a result osmosis is a measure of osmotic pressure. Osmotic pressure of a 0.02 M cane sugar solution at 300 k is: ( R = 0.0821 L atm degree ${}^{-1}$ mol${}^{-1}$)

• A. 0.3568atm
• B. 0.4936atm
• C. 0.1562atm
• D. 0.5623atm

Answer 1

The correct option is B 0.4936atm

π=iCRT

Where π= osomotic pressure

i =vant Hoff coefficient

C= concentration

T=300 K

R= Natural gas constant

π=1*(.02)*(.0821)*300

π = .493 atm