Answered: How is the distribution coefficient for…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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How is the distribution coefficient for a liquid–liquid mixture defined?

Expert Solution

Step 1

In liquid-liquid extraction two immiscible phases, generally aqueous and organic, are taken and put into a separatory funnel. The compounds in the two phases redistribute themselves according to their relative solubility in the two phases.

Step 2

If a solute is to be separated using liquid-liquid extraction a term called distribution coefficient is defined. It is the concentration of the solute in the organic phase to the concentration of the same solute in the aqueous phase. It is the equilibrium constant for the process.

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