CHEM 233 Lecture Notes - Lecture 7: Carboxylic Acid, Partition Coefficient, Amine
Document Summary
Base extraction of benzoic acid from acetanilide followed by recrystallization and melting point determination. The goal of this lab is to perform a base extraction of benzoic acid from acetanilide. Along with the recrystallization, chromatography and distillation methods for separating and purifying organic liquids and solids, extraction is also used to separate immiscible liquids. The separation between the immiscible liquids is known as phase distribution because the liquids are in two different phases. This phase distribution results in partitioning or adsorption phenomenon. Extraction is based on the partitioning which happens due to difference in solubility of liquids concluding selective dissolution. The two immiscible phases in which the solute will be distributed include the extracting phase and the original phase. If the value of k is greater than 1 that means the solute will remain largely in the extracting solvent. At equilibrium, the concentration of the solute in both the phases is equal and constant.
