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Calculate the number of moles for both the reactants Deduce which of the two is the limiting reagent Calculate the theoretical yield of the FOCUS product based on your title and aims Calculate the percentage yield

Calculate the number of moles for both the reactants Deduce which of the two is the limiting reagent Calculate the theoretical yield of the FOCUS product based on your title and aims Calculate the percentage yield

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 102AP
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21:02 Calculate the number of moles for both the reactants Deduce which of the two is the limiting reagent Calculate the theoretical yield of the FOCUS product based on your title and aims Calculate the percentage yield Add a caption... > Status (Custom) +
Transcribed Image Text:21:02 Calculate the number of moles for both the reactants Deduce which of the two is the limiting reagent Calculate the theoretical yield of the FOCUS product based on your title and aims Calculate the percentage yield Add a caption... > Status (Custom) +
Aspirin is the common name for the compound acetylsalicylic acid, widely used as a fever reducer and as a pain killer. Salicylic acid, whose name comes from Salix, the willow family of plants, was derived from willow bark extracts. In folk medicine, willow bark teas were used as headache remedies and other tonics. Nowadays, salicylic acid is administered in the form of aspirin which is less irritating to the stomach than salicylic acid. To prepare aspirin, salicylic acid is reacted with an excess of acetic anhydride. A small amount of a strong acid is used as a catalyst which speeds up the reaction. In this experiment, phosphoric acid will be used as the catalyst. The excess acetic acid will be quenched with the addition of water. The aspirin product is not very soluble in water so the aspirin product will precipitate when water is added. The synthesis reaction of aspirin is shown below: Actic anhydride 5 ml. Acetic acid Salicylic acid 28 Acetylsalicylie acid Procedure 1) Mix salicylic acid and acetic anhydride in a 125 ml Erlenmeyer flask, add 5drops of H2SO4. 2) Heat on steam bath for 10 min, then cool. 3) Add 50 ml water and cool on ice. 4) collect product by vacuum filtration 5) Air dry the crude product crystals Data and observations Crude product + watch glass = 32.02 g Watch glass = 30.10 g During mixing, the addition of sulphuric acid caused some fizzing After addition of water and cooling, no crystals appeared, thus it was placed on ice for more than 10 min and crystals appeared
Transcribed Image Text:Aspirin is the common name for the compound acetylsalicylic acid, widely used as a fever reducer and as a pain killer. Salicylic acid, whose name comes from Salix, the willow family of plants, was derived from willow bark extracts. In folk medicine, willow bark teas were used as headache remedies and other tonics. Nowadays, salicylic acid is administered in the form of aspirin which is less irritating to the stomach than salicylic acid. To prepare aspirin, salicylic acid is reacted with an excess of acetic anhydride. A small amount of a strong acid is used as a catalyst which speeds up the reaction. In this experiment, phosphoric acid will be used as the catalyst. The excess acetic acid will be quenched with the addition of water. The aspirin product is not very soluble in water so the aspirin product will precipitate when water is added. The synthesis reaction of aspirin is shown below: Actic anhydride 5 ml. Acetic acid Salicylic acid 28 Acetylsalicylie acid Procedure 1) Mix salicylic acid and acetic anhydride in a 125 ml Erlenmeyer flask, add 5drops of H2SO4. 2) Heat on steam bath for 10 min, then cool. 3) Add 50 ml water and cool on ice. 4) collect product by vacuum filtration 5) Air dry the crude product crystals Data and observations Crude product + watch glass = 32.02 g Watch glass = 30.10 g During mixing, the addition of sulphuric acid caused some fizzing After addition of water and cooling, no crystals appeared, thus it was placed on ice for more than 10 min and crystals appeared
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