What name is given to the migration of a solvent from a dilute solution to a more concentrated solution across a semi-permeable membrane?
Membrane osmometer Solute cannot cross the semipermeable membrane but the solvent is able to cross the membrane. Solvent flows across the membrane to dilute the solution. The pressure required to stop the flow across the membrane is called the osmotic pressure. The osmotic pressure is measured and used to calculate formula_1. In an ideally dilute solution, van ‘t Hoff’s law of osmotic pressure can be used to calculate formula_1 from osmotic pressure. Membrane osmometer A membrane osmometer is a device used to indirectly measure the number average molecular weight (formula_1) of a polymer sample. One chamber contains pure solvent and the other
Solution solution other than the solvent are called solutes. The solution has the same physical state as the solvent. If the solvent is a gas, only gases are dissolved under a given set of conditions. An example of a gaseous solution is air (oxygen and other gases dissolved in nitrogen). Since interactions between molecules play almost no role, dilute gases form rather trivial solutions. In part of the literature, they are not even classified as solutions, but addressed as mixtures. If the solvent is a liquid, then almost all gases, liquids, and solids can be dissolved. Here are some examples: Counter