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  4. The osmotic pressure of 0.1 M sodium chloride solution at 27° C is

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Q. The osmotic pressure of $0.1 \,M$ sodium chloride solution at $27^{\circ} C$ is

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Solution:

$\pi=( CST ) \times i $
$T =273+21=300$
$\underset{(i=2)}{ NaCl} \longrightarrow Na ^{+}+ Cl ^{-}$
$=(0.1 \times 0.0821 \times 300) \times 2$
$ \Rightarrow 4.92 \,atm$