Question

A $5.8\%$(wt/vol.) $NaCl$ solution will exert an osmotic pressure closest to which one of the following?

• A. $5.8\%$ (wt./vol) sucrose solution
• B. $5.8\%$ (wt./vol) glucose solution
• C. $2$ M sucrose solution
• D. $1$ M glucose solution

Answer 1

The correct option is C $2$ M sucrose solution

$\pi =icRT$

RT=constant

$\pi \propto ic$

$NaCl\to N{a}^{+}C{l}^{-}$

$i=2$

$c=\frac{5.8}{58.5}\times \frac{1000}{100}$

$c=1M(approx.)$

$\pi \propto 4,\pi =2RT$

2M Sucrose solution,

$\pi =2RT$