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  • Calculate the Osmotic pressure of a solution having 0.2 M  & 0.6 M <img alt="\math

Calculate the Osmotic pressure of a solution having 0.2 M \mathrm{NaCl} & 0.6 M \mathrm{Na_{2}SO_4} and 0.9 M \mathrm{HA}.
(given: weak acid is 20 % dissociated at 250 K)

Option: 1

65.76


Option: 2

67.24


Option: 3

34.86


Option: 4

60.28


Answers (1)

\begin{aligned} & \pi=\pi _\mathrm{NaCl}+\pi_{ \mathrm{Na}_2 \mathrm{SO}_4}+\pi_{\mathrm{H}_A} \\ \\& \mathrm{\pi=0.2 R T \times 2+0.6 \mathrm{RT} \times 3+0.9 R T \times 1.2} \\ \\& \pi=0.0821 \times 250(0.4+1.8+1.08) \\ \\& \pi=20.5 \times 3.28 \\ \\& \pi=67.24 \end{aligned}

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Kshitij

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