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
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
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7823f729-a193-4611-841d-81260575058f%2F33bd87f7-5180-4db7-8b38-482eb2756f87%2Fd3zki6d_processed.jpeg&w=3840&q=75)
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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