CHEM 233 Lecture Notes - Lecture 6: Acetanilide
6 Dec 2015
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Document Summary
Base extraction of benzoic acid from acetanilide recrystallization of products. The objective of this lab is to utilize the liquid-liquid base extraction method with sodium hydroxide to separate a 1:1 mixture of benzoic acid and acetanilide. The products are isolated to their solid forms by boiling off the solvent or adding aqueous hydrochloric acid. Recrystallization is conducted to purify each isolated solid from boiling water. The melting point ranges and infrared spectra (ir) are measured in order to characterize and evaluate the extraction and recrystallization of the compounds along with percentage yields. Acetanilide and benzoic acid are the two substances that will be separated in the experiment. Despite the presence of polar functional groups, the two compounds are immiscible in water since the rest of the molecules are largely nonpolar. In the same way as methylene chloride, they are soluble in organic solvents.
