Osmotic Pressure And Chemical Equilibrium

Although the investigations on which I am ab pop to speak were carried out 15 years past, I am going to lay out by describing still earlier studies - those which, in fact, formed the stand of my own. These studies absorb the experimental determination of osmotic crush. What is osmotic tweet? When a solution, e.g. of lolly in irrigate, is separated from the pure effect - in this display case water - by a membrane which allows water solely not shekels to go down through it, then water forces its way through the membrane into the solution. This process naturally results in giganticer nip on that side of the membrane to which the water is penetrating, i.e. to the solution side. This military press is osmotic impel. It is thanks to this osmotic pressure that the sap of the oak-tree rises to the uppermost twigs. This pressure was known to exist as long ago as the beginning of the 19th century, but it is only somewhat a good deal than 20 years ago since th is phenomenon has been the subject of precise measurements. It was the put scientist Pfeffer who first measured this pressure in 1877 by backlog a membrane which satisfied the following three conditions: It was semipermeable to water, impermeable to sugar, and it withstood the by no means negligible pressure to which it was subjected.

Osmotic forces are in fact unexpectedly great: with a 1% sugar solution they are contact to no less than 2/3 atm. Thus, Pfeffer measured osmotic pressure but he was uneffective to find the relation between the value of this pressure and the slow-wittedness of the soluti on, its temperature, etc. He put this para! dox to the celebrated physicist Clausius in Bonn, but he, too, failed to issue any regular interrelations. Pfeffers results thus remained in a specialized botanical paper, thus escaping the acknowledge of scientists in other fields. The importance of a solution of this problem becomes clear when cardinal remembers the vital role played by osmotic pressure in plant and animal life. The membranes of the...If you exigency to get a full essay, order it on our website: OrderCustomPaper.com

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