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5. Someone mixed up the chemicals for making aspirin and did this chemical reaction instead. Draw...
1) Which reactant, salicylic acid or acetic anhydride, is in excess? Show your work. 2) If you we...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Exercise 7: The % Yield of Aspirin Name Date Read Exercise 7 in your lab manual....
Exercise 7: The % Yield of Aspirin Name Date Read Exercise 7 in your lab manual. Complete the Pre-lab Assignment. In this substitute lab exercise, you will watch a short video on preparing aspirin. The video is posted on the course Moodle page, and it provides the masses of the reactants and the product; you should be able to calculate the theoretical yield and the % yield from the data given by the video. Submit the completed assignment by March...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification Reactions Q: Calculate the expected mass of both methyl salicylate and aspirin assuming 100% yield. EXPERIMENT7 PREPARATION OF PHARMACEUTICALS...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
Pre-lab Questions: Importance A one-step preparation of aspirin from its precursor, salicylic acid, via an ester...
Pre-lab Questions:
Importance A one-step preparation of aspirin from its precursor, salicylic acid, via an ester formation illustrates one of synthetic organic chemistry's most important uses, making the drugs that treat all types of illnesses. OH HOOH Background Aspirin is a prodrug of salicylic acid, the actual active drug. A compound related to salicylic acid, salicin, was first isolated from willow bark in the mid 1700's, but willow-bark extract was used by the ancient Greeks as a treatment for pain...
5. A student determined AH for the reaction below using the procedure you used in this...
5. A student determined AH for the reaction below using the procedure you used in this lab but the student made mistakes. For each of the following mistakes, state whether the magnitude of the student's AH would be higher, lower, or no different from the correct AH value. Explain each answer. Mg(s) + 2HCl(aq) + MgCl2(aq) + H2(g) a. The student dropped some Mg on the lab bench while transferring it to the calorimeter after weighing it. b. The student...
PRE-LAB QUIZ for EXPERIMENT 27 Name 1. In Experiment 27, a modified Perkin reaction is performed....
PRE-LAB QUIZ for EXPERIMENT 27 Name 1. In Experiment 27, a modified Perkin reaction is performed. The Perkin reaction is a carbonyl condensation reaction that is related to the Claisen condensation and aldol condensation. In this experiment, the reactants are benzaldehyde and 3-benzoylpropionic acid with sodium acetate and acetic anhydride as catalysts. Draw the structures of these compounds in the space below. benzaldehyde 3-benzoylpropionic acid acetic anhydride 2. The first step of the reaction is the formation of the mixed...
Samples Written Ques 1-5 hybrid Compatibility Mode Q- Search in Document Home Insert Draw Design Layout...
Samples Written Ques 1-5 hybrid Compatibility Mode Q- Search in Document Home Insert Draw Design Layout References Mailings Review View Share Comments Cambria AaBbCcDdEe AaBbCcDdEeAaBbCcD AaBbCcDdE Paste Haading 1 Styles Pane Imagine a biochemistry lab is testing out a new procedure to improve the synthesis of a protein. The hypothesis is that the new procedure will add an acid as a catalyst to improve the condensation reaction between glycerol and the fatty acid -trans Oleic acid. The scientist believe adding...
please do from question 2 and so Acute Aspirin Overdose Relationship to the Blood Buffering System Focus concep...
please do from question 2 and so
Acute Aspirin Overdose Relationship to the Blood Buffering System Focus concept The response of the carbonic acid/bicarbonate buffering system to an overdose of aspirin is Prerequisites Principles of acids and bases, including pK, and the Henderson-Hasselbalch equation. The carbonic acid bicarbonate blood buffering system. Background You are an emergency room physician and you have just admitted a patient, a 23-year-old female, who had been hospitalized for psychiatric treatment for the past six months....
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
Microscale techniques: In today's experiment we will be using very small amounts of chemical reactants. This...
Microscale techniques: In today's experiment we will be using very small amounts of chemical reactants. This method is generally less expensive and more environmentally-friendly than traditional "test tube" chemistry. Some of the waste products produced in today's experiment, particularly those containing lead and barium, are harmful to the environment. By using such small amounts of chemical reactants we generate far less waste than by using larger scale methods. Procedure 1. Put on your safety goggles. Be sure to wear them...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Exercise 7: The % Yield of Aspirin Name Date Read Exercise 7 in your lab manual. Complete the Pre-lab Assignment. In this substitute lab exercise, you will watch a short video on preparing aspirin. The video is posted on the course Moodle page, and it provides the masses of the reactants and the product; you should be able to calculate the theoretical yield and the % yield from the data given by the video. Submit the completed assignment by March...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
Pre-lab Questions:
Importance A one-step preparation of aspirin from its precursor, salicylic acid, via an ester formation illustrates one of synthetic organic chemistry's most important uses, making the drugs that treat all types of illnesses. OH HOOH Background Aspirin is a prodrug of salicylic acid, the actual active drug. A compound related to salicylic acid, salicin, was first isolated from willow bark in the mid 1700's, but willow-bark extract was used by the ancient Greeks as a treatment for pain...
5. A student determined AH for the reaction below using the procedure you used in this lab but the student made mistakes. For each of the following mistakes, state whether the magnitude of the student's AH would be higher, lower, or no different from the correct AH value. Explain each answer. Mg(s) + 2HCl(aq) + MgCl2(aq) + H2(g) a. The student dropped some Mg on the lab bench while transferring it to the calorimeter after weighing it. b. The student...
PRE-LAB QUIZ for EXPERIMENT 27 Name 1. In Experiment 27, a modified Perkin reaction is performed. The Perkin reaction is a carbonyl condensation reaction that is related to the Claisen condensation and aldol condensation. In this experiment, the reactants are benzaldehyde and 3-benzoylpropionic acid with sodium acetate and acetic anhydride as catalysts. Draw the structures of these compounds in the space below. benzaldehyde 3-benzoylpropionic acid acetic anhydride 2. The first step of the reaction is the formation of the mixed...
Samples Written Ques 1-5 hybrid Compatibility Mode Q- Search in Document Home Insert Draw Design Layout References Mailings Review View Share Comments Cambria AaBbCcDdEe AaBbCcDdEeAaBbCcD AaBbCcDdE Paste Haading 1 Styles Pane Imagine a biochemistry lab is testing out a new procedure to improve the synthesis of a protein. The hypothesis is that the new procedure will add an acid as a catalyst to improve the condensation reaction between glycerol and the fatty acid -trans Oleic acid. The scientist believe adding...
please do from question 2 and so
Acute Aspirin Overdose Relationship to the Blood Buffering System Focus concept The response of the carbonic acid/bicarbonate buffering system to an overdose of aspirin is Prerequisites Principles of acids and bases, including pK, and the Henderson-Hasselbalch equation. The carbonic acid bicarbonate blood buffering system. Background You are an emergency room physician and you have just admitted a patient, a 23-year-old female, who had been hospitalized for psychiatric treatment for the past six months....
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
Microscale techniques: In today's experiment we will be using very small amounts of chemical reactants. This method is generally less expensive and more environmentally-friendly than traditional "test tube" chemistry. Some of the waste products produced in today's experiment, particularly those containing lead and barium, are harmful to the environment. By using such small amounts of chemical reactants we generate far less waste than by using larger scale methods. Procedure 1. Put on your safety goggles. Be sure to wear them...
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