Osmotic pressure
Osmotic Pressure
Osmotic pressure (/ɒzˈmɒtɪk ˈprɛʃər/) is the minimum pressure which needs to be applied to a solution to prevent the inward flow of its pure solvent across a semipermeable membrane. It is also defined as the measure of the tendency of a solution to take in a pure solvent by osmosis.
Etymology
The term "osmotic pressure" originates from the root word "osmosis" (/ɒzˈmoʊsɪs/), which is derived from the Greek words "osmos" meaning "push" and "osis" meaning "condition". The term "pressure" (/ˈprɛʃər/) is derived from the Latin "pressura" meaning "action of pressing".
Related Terms
- Osmosis: The process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
- Semipermeable Membrane: A type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by diffusion.
- Solvent: A substance that dissolves a solute, resulting in a solution.
- Solute: The minor component in a solution, dissolved in the solvent.
See Also
External links
- Medical encyclopedia article on Osmotic pressure
- Wikipedia's article - Osmotic pressure
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