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Q.
Osmotic pressure of a sugar solution at $24^{\circ}C$ is 2.5 atmospheres. Determine the concentration of the solution in gram mole per litre.
Solutions
Solution:
Here it is given that
$\pi=2.5\,atm, T=24+273=297\,.K$,
$S=0.0821$ lit. atm. $deg^{-1}\,mol^{-1}, C=$ ?
We know that $\pi = CST$
or $C=\frac{\pi}{ST}$
$=\frac{2.5}{0.0821 \times 297}$
$=0.1025$ moles/litre