CHEM123L Lecture Notes - Lecture 1: Eyepiece, Merck Index, Acetic Anhydride
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24 Feb 2017
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The objective of this lab experiment was to synthesize crude acetaminophen from a given amount of p-aminophenol and acetic anhydride, with the use of heat to stimulate the reaction. Crude acetaminophen is then isolated from the excess acetic acid, which is created as a by-product of the reaction, through vacuum filtration. The products are then purified using the standard recrystallization procedure. After completely drying and isolating the products, the melting point can be determined in order to identify the accuracy of the purification. The recovered mass of the crude product was 3. 28g, and the purified product weighed 2. 54g, which were synthesized from. The percent yield of pure acetaminophen was calculated to be approximately 60. 9%. Additionally, the experimental melting points of both the crude and purified products were determined to be 158 c - 165 c and 156 c - 162 c, respectively.
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