CHEM 2251 Lecture Notes - Lecture 1: Acetic Anhydride, Ethyl Acetate, Watch Glass
Document Summary
Performing recrystallization of aspirin from the crude product of salicylic acid with acetic anhydride". Intro/purpose: the salicylic acid will be used in this reaction to react with acetic anhydride to produce acetylsalicylic acid, (aspirin) in presence of sulfuric or phosphoric acid. After the sample is collected it will then be purified through recrystallization process that will use heat, alcohol, and cold water. The melting point will also be determined of this product to show whether the product that was isolated had been the expected product for this experiment. The tlc will be conducted to identify the polarity of this product and to further prove of the presence of aspirin. And, finally, the purity of this product would be determined by addition of a ferric chloride reagent. 1. weigh 4. 0 grams of salicylic acid in a 135 ml erlenmeyer flask, then use this quantity of salicylic acid to calculate the theoretical yield of aspirin.
