Question

Find out the osmotic pressure $\left(inatm\right)$ for $0.25M$ aqueous solution of urea at ${27}^{\circ }C$

• A. $6.15atm$
• B. $0.615atm$
• C. $0.0615atm$
• D. $61.5atm$

Answer 1

The correct option is A $6.15atm$

Osmotic pressure $\left(\pi \right)$ is given by
$\pi =CRT$
where
$C\text{is the concentration (molarity)}=0.25MR\text{is ideal gas constant}=0.0821Latmmo{l}^{-1}{K}^{-1}T\text{is temperature}={27}^{\circ }C=300K$

$\pi =(0.25\times 0.0821\times 300)atm\pi =6.157atm$