Question

What is the osmotic pressure $\left(inatm\right)$ for $0.5M$ aqueous solution of glucose at ${127}^{\circ }C$
Molecular mass of glucose is 180 g/mol

• A. $4.6atm$
• B. $16.4atm$
• C. $0.08atm$
• D. None of the above

Answer 1

The correct option is B $16.4atm$

Osmotic pressure $\left(\pi \right)$ is given by
$\pi =CRT$
where
$C\text{is the concentration (molarity)}=0.5MR\text{is ideal gas constant}=0.0821Latmmo{l}^{-1}{K}^{-1}T\text{is temperature}={127}^{\circ }C=400K$

$\pi =(0.5\times 0.0821\times 400)atm\pi =16.42atm$