CHEM 233 Lecture 7: Base Extraction of Benzoic Acid from Acetanilide followed by Recrystallization and melting point Determination

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10 Aug 2016

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. This lab also involves identifying immiscible layers in a separatory funnel, operating a separatory funnel, purifying a solid by recrystallization, isolating crystals by vacuum filtration, obtaining a melting point of crystalline solid and differentiating products by ir spectroscopy. This lab incorporates separation of 1:1 mixture of benzoic acid and acetanilide with base extraction naoh. 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.