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Here, salicylic acid is subjected to acetylation with the help of acetic anhydride to yield acetylsalicylic acid (commonly known as aspirin) and acetic acid as the final product. It can be noted that acetic anhydride is also used as an acetylating agent in the synthesis of THC acetate ester and diacetylmorphine.
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Jul 02, 2019 · In this laboratory exercise, you can prepare aspirin (acetylsalicylic acid) from salicylic acid and acetic anhydride using the following reaction: salicylic acid (C7H6O3) + acetic anhydride (C4H6O3) → acetylsalicylic acid (C9H8O4) + acetic acid (C2H4O2) First, gather the chemicals and equipment used to synthesize the aspirin.
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Salicylic acid is a common organic reagent and has an alcohol group on it which will react with the carboxylic acid group of the acetic acid. The reaction produces aspirin (acetylsalicylic acid) along with water as a side product. However, because of the water side product, this method does not work very well. If acetic anhydride is substituted ... Acetic anhydride is manufactured in North America by two processes. Most of the production uses the ketene - acetic acid technology, which involves thermal cracking acetic acid to ketene and the subsequent reaction of the ketene with additional acetic acid to form acetic anhydride. Methyl acetate carbonylation is a second route.
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In this reaction, an excess of acetic anhydride (C 4 H 6 O 3) is added to a measured mass of salicylic acid (C 7 H 6 O 3) in the presence of a catalyst, sulfuric acid (H 2 SO 4). The mixture is heated to form the acetylsalicylic acid (C 9 H 8 O 4 ) and acetic acid (C 2 H 4 O 2 ). This molecule is aspirin. Although this reaction can also be done with ethanoyl chloride, aspirin is manufactured by reacting 2-hydroxybenzoic acid with ethanoic anhydride at 90°C. The reasons for using ethanoic anhydride rather than ethanoyl chloride include: Ethanoic anhydride is cheaper than ethanoyl chloride.
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Salicylic acid (C7H6O3) reacts with acetic anhydride (C4H6O3) to form acetylsalicylic acid (C9H8O4).2C7H6O3 (aq) + C4H6O3 (aq) mc002-1. jpg 2C9H8O4 (aq) + H2O (l)What is the limiting reactant if 70.0 g of C7H6O3 and 80.0 g of C4H6O3 react?A waterB salicylic acidC acetic anhydrideD acetylsalicylic ic acid, and it is synthesized from the reaction of acetic anhydride with salicylic acid in the presence of phosphoric acid as a catalyst. The by-product is acetic acid (Figure 5.1). → H 3 PO 4 acetic anhydride salicylic acid aspirin acetic acid F.W. = 102.04 g/mol F.W. = 138.12 g/mol F.W. = 180.15 g/mol F.W. = 60.05 g/mol