Distribution law

Distribution of the law, according to which the ratio of the concentrations of the substance in two immiscible or partially miscible liquids in equilibrium with each other, at a given temperature is a constant value:
S1/S2 =K,
where C1 and C2 concentrations of substances dissolved in the first and second solvents, It is a constant called the coefficient of the distribution.
Deviations from the law of distribution point to dissociation and Association of molecules of the dissolved substance. This law is based removing the dissolved substance from a solution with shaking with immiscible solvent extraction). From the distribution law, it follows that for the most complete extraction profitable to pick up the solvent in which the extracted substance dissolves, and to apply taken a number of solvent have consistently small portions. The extraction contributes to the suppression of dissociation and the decrease of solubility of the extracted substance in the original liquid, which is achieved by adding the appropriate electrolytes. Extraction, based on the distribution law, is widely used in various industries, particularly in the pharmaceutical, manufacturing many galenovyh, novogalenovyh preparations, extracts, tinctures, elixirs.