Class 12 Chemistry simulations · Solutions

Osmosis and osmotic pressure

Separate a solution from pure water by a semipermeable membrane and find the pressure that stops osmosis.

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What to notice

Water flows into the more concentrated side; applying more than π reverses the flow (reverse osmosis, used to purify water).

Key relation

π = i C R T ; R = 0.0821 L atm mol⁻¹ K⁻¹

Try this

Find π for 0.1 M glucose at 300 K. Then apply a larger pressure.

What you can change

• Concentration: 0.01 to 0.5 mol/L
• van ’t Hoff factor i: 1 to 3
• Temperature: 273 to 350 K
• Applied pressure: 0 to 30 atm

More in Solutions

• Colligative properties: boiling and freezing point
• Henry’s law: gas dissolved in a liquid
• Raoult’s law: vapour pressure of a mixture

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