$18 g$ glucose and $6 g$ urea are dissolved in $1$ litre aqueous solution at $27^{o} C .$ The osmotic pressure of the solution will be___________.

3.826

atm

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4.926

atm

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2.92

atm

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9.42

atm

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Solution

The correct option is B $4.926$ atm
$π V = (n_{1} + n_{2}) R T$
$π V = (\begin{matrix} \frac{w_{1}}{m_{1}} + \frac{w_{2}}{m_{2}} \end{matrix}) R T$
$π t i m e s 1 = (\begin{matrix} \frac{18}{180} + \frac{6}{60} \end{matrix}) \times 0.0821 \times 300$
$π = 4.926 a t m$

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18g glucose and 6g urea are dissolved in 1 litre aqueous solution at 27oC. The osmotic pressure of the solution will be___________.

The correct option is B 4.926 atmπV=(n1+n2)RTπV=(w1m1+w2m2)RTπtimes1=(18180+660)×0.0821×300π=4.926atm

$18 g$ glucose and $6 g$ urea are dissolved in $1$ litre aqueous solution at $27^{o} C .$ The osmotic pressure of the solution will be___________.

The correct option is B $4.926$ atm
$π V = (n_{1} + n_{2}) R T$
$π V = (\begin{matrix} \frac{w_{1}}{m_{1}} + \frac{w_{2}}{m_{2}} \end{matrix}) R T$
$π t i m e s 1 = (\begin{matrix} \frac{18}{180} + \frac{6}{60} \end{matrix}) \times 0.0821 \times 300$
$π = 4.926 a t m$