Questions tagged [osmosis]

the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.

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What does the osmotic pressure do in an electrolytic solution?

I have learnt that in an electrochemical cell, the osmotic pressure in the solution hinders the flow of ions from the electrode to the solution, rather some ions may accumulate on the electrode ...
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Why does solvent particles move towards solution when semi permeable membrane is added?

When a SPM is added in between solute and solution the water molecules move towards salt water even though the concentration is same both sides. Why does this happen? According to SPM's perspective, ...
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Will a reverse osmosis membrane exclude perfluorobutanoic acid?

I recently did a water quality test and it showed a detectable level of perfluorobutanoic acid, a potentially dangerous carboxylate PFC. Will a reverse osmosis water purification system exclude this ...
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How will water move across a membrane that is permeable to only one solute?

If there are two solutions separated by a membrane, which is permeable only to one solute and the solvent, will there be any net movement? Let's assume the two solutes are glucose and sodium ions, ...
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Is it appropriate to approximate solute particles in a dilute solution as an ideal gas?

I was studying osmosis and I came across the formula for osmotic pressure. I decided to see the derivation for osmotic pressure in a dilute solution. The derivation involved an equation involving the ...
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Dependence of Osmotic Effects on Particle Size

van't Hof's equation for osmotic pressure is derived with the assumption, among others, that the particle size of the solute is comparable to the particles size of the solvent. It holds well so long ...
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Why does sugar water diffuse better than water through a gummy bear?

Our science class did a lab about osmosis, where we left a gummy bear in solutions of salt and sugar, as well as tap water. When we came back, we were all surprised to see that our gummy bears in ...
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Inverse use of a reverse osmosis membrane

I've got a question regarding Osmosis. I recently came across 'Thin-film composite membranes'. Those are build up of layers with one of those being semipermeable. As I'm not well versed in chemistry, ...
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Why wouldn't solvents be interchanged in isotonic solutions?

While studying osmosis, my book remarks that Two solutions having same osmotic pressure at a given temperature are called isotonic solutions. When such solutions are separated by semipermeable ...
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Osmotic pressure and ideal gas equation

When I was studying osmosis I came across the formula for osmotic pressure as: $$\text{Osmotic pressure} =CRT$$ where $C$=molarity $(n/V)$ $R$=universal gas constant $T$=temperature This ...