Question

A solution of sucrose(molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution, what is its osmotic pressure (R = 0.082 lit. atm.$k^{- 1}mol^{- 1}$) at 273k.

• A. 6.02 atm
• B. 4.92 atm
• C. 4.04 atm
• D. 5.32 atm

Answer 1

Answer: (B)

4.92 atm

Answer 2

$\pi = CRT$

$\pi = \frac{w \times R \times T}{mV} = \frac{68.4 \times 0.0821 \times 273}{342}$= 4.92 atm