The osmotic pressure of 0.4% urea solution is | vedclass

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(C) Osmotic pressure is a colligative property and depends on the concentration of the solute particles.When two solutions of equal volumes are mixed,

Vedclass · Accepted Answer

$2.06$

Vedclass · Answer

(C) Osmotic pressure is a colligative property and depends on the concentration of the solute particles.When two solutions of equal volumes are mixed,the resultant osmotic pressure $\pi_{res}$ is the average of the individual osmotic pressures,assuming no chemical reaction occurs between the solutes.$\pi_{res} = \frac{\pi_1 V_1 + \pi_2 V_2}{V_1 + V_2}$Given $V_1 = V_2 = V$,then $\pi_{res} = \frac{\pi_1 V + \pi_2 V}{2V} = \frac{\pi_1 + \pi_2}{2}$.Substituting the given values: $\pi_{res} = \frac{1.66 + 2.46}{2} = \frac{4.12}{2} = 2.06\ atm$.

The osmotic pressure of $0.4\%$ urea solution is $1.66\ atm$ and that of a solution of sugar of $3.42\%$ is $2.46\ atm$. When both the solutions are mixed in equal volumes,then the osmotic pressure of the resultant solution will be ......... $atm$.

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