Английская Википедия:Distribution law
Шаблон:Short description Шаблон:Redirect Шаблон:Refimprove Distribution law or the Nernst's distribution law[1][2]Шаблон:Better source gives a generalisation which governs the distribution of a solute between two immiscible solvents. This law was first given by Nernst who studied the distribution of several solutes between different appropriate pairs of solvents.
C1/C2 = Kd
Where Kd is called the distribution coefficient or the partition coefficient. Concentration of X in solvent A/concentration of X in solvent B=Kď If C1 denotes the concentration of solute X in solvent A & C2 denotes the concentration of solute X in solvent B; Nernst's distribution law can be expressed as C1/C2 = Kd. This law is only valid if the solute is in the same molecular form in both the solvents. Sometimes the solute dissociates or associates in the solvent. In such cases the law is modified as, D(Distribution factor)=concentration of solute in all forms in solvent 1/concentration of solute in all forms in solvent 2.
Further reading
- Martin's Physical Pharmacy & pharmaceutical sciences; fifth edition, Patrick.J.Sinko Шаблон:ISBN, Lippincott Williams & Wilkins.Шаблон:Full citation needed Note, this source does not describe Nernst in the manner the text presents, nor is it evident that it is the source of the quotation (as much as one can surmise through search). Lacking full information (i.e., page number), the source is moved to Further reading.
References