Question

What will be the osmotic pressure in Pascals exerted by a solution prepared by dissolving $1.0$g of polymer molar mass 150, 000 in 500 mL of water at $37º?$

• A. $30.96Pa$
• B. $34.36Pa$
• C. $68.72Pa$
• D. $48.25Pa$

Answer 1

Answer: (B)

$34.36Pa$

Answer 2

No. of moles of polymer $= \frac{1}{150,000}$

$\pi = crT = \frac{n}{V}RT$

$\pi = \frac{1}{150,000} \times \frac{8.314 \times 10^{3} \times 310}{0.5} = 34.36Pa$

($R = 8.314 \times 10^{3}PaLK^{- 1}mol^{- 1}$)