Homework Answers
1. we use melting point to check the product formation. if you get the melting point 1350C, that means your formed product is aspirin.
3.No, Yields of the reaction is not 100% because of side reactions.
4. The purest substance is a crystal. so, that the method ask you to separate the pure crystals and not only the solid that might be a mixture of aspirin and starting materials.
please post one question at a time.
Given that the melting point of salicylic acid is 159 degree celsius, can you be certain that the product isolated was not pure salicylic acid that was unchanged during the reaction? Justify your answer using your data.
If a student starts with 2.56g of p-aminophenol and excess arctic anhydride, what is the theoretical yield of acetaminophen?
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Name Lab Partner LAB 9 REFLECTIVE EXERCISES Lab Section 1 What data did you collect to...
DATA Part A: Synthesis of Aspirin Mass of salicylic acid Mass of watch glass Mass of...
DATA Part A: Synthesis of Aspirin Mass of salicylic acid Mass of watch glass Mass of watch glass + dry product Calculated mass of dry product Melting range of product Addition of FeCl, to salicylic acid Addition of FeCl, to product Theoretical yield of aspirin Show calculation: Percent yield of aspina product Show calculation: Lab 9 . Formation o Section LAB 9 REFLECTIVE EXERCISES Date 1 What data did you collect to indicate that you successfully produced aspirn? What did...
Pre-lab Assignment: Synthesis of Aspirin 1. What is the chemical name for aspirin? 2. How does...
Pre-lab Assignment: Synthesis of Aspirin 1. What is the chemical name for aspirin? 2. How does aspirin work in the human body? 3. What is the name of the compound that was isolated from the bark of the willow and had a similar effect as aspirin? 4, what is a common side effect of the compound from #4? 5. Draw and label the complete setup to perform vacuum filtration. 6. What is the theoretical yield for aspirin if you start...
Name Lab Partner Lab Section Date Lab 9 DATA Part A: Synthesis of Aspirin Mass of...
Name Lab Partner Lab Section Date Lab 9 DATA Part A: Synthesis of Aspirin Mass of salicylic acid 1.047 g Mass of watch glass 37.3959 Mass of watch glass + dry product 38.1409 Calculated mass of dry product 0.7459 Melting range of product 136-140 Addition of FeCl, to salicylic acid Addition of FeCl, to product Theoretical yield of aspirin Show calculation: Percent yield of aspirin product Show calculation:
Lab Section Nume Preparation and Examination of a Drug: Aspirin EXPERIMENT 25 OBSERVATIONS AND RESULTS 1....
Lab Section Nume Preparation and Examination of a Drug: Aspirin EXPERIMENT 25 OBSERVATIONS AND RESULTS 1. The Synthesis of Aspirin Record the weight of your aspirin, and calculate the percentage yield. Base the yield on salicylic acid since we acetic anhydride was used. Show all calculations. Weight of aspirin d. 08035 Yield of aspirin 2. Contaminants in Aspirin What was the color of the salicylic acid-ferric chloride test solution? On the basis of color is either your aspirin or commercial...
A similar pain reliever to aspirin is acetaminophen, which can be synthesized following a similar reaction scheme se...
A similar pain reliever to aspirin is acetaminophen, which can be synthesized following a similar reaction scheme seen below. - H₂C H₂C HO NH. MH =0 + o + -cн, но p-Aminophenol нас Acetic anhydride Acetaminophen Acetic Acid a. If 2.00g of p-Aminophenol ( 109.1 g/mol) reacts with 5.00 mL of acetic anhydride (102.1 g/mol and density - 1.08 g/mL), what mass of acetaminophen (180.2 g/mol) would be made? Show all calculations. Mass of acetaminophen: b. If you only isolated...
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 Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of wh...
Preparation of Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of when working with the following chemicals? a. Acetic anhydride b. Concentrated sulfuric acid 2. Explain the following terms as they relate to this experiment. a. Catalyst b. Limiting reactant 3. Following the procedure described in this experiment, a student reacted 2.775 g of salicylic acid with 4.0 ml of acetic anhydride and recovered 2.986 g of aspirin. a. Calculate the number of moles...
1. Mass of salicylic acid (g) 2.0089 5.10ml & 2. Volume of acetic anhydride (mL) Limiting...
1. Mass of salicylic acid (g) 2.0089 5.10ml & 2. Volume of acetic anhydride (mL) Limiting reactant is (circle one): Salicylic Acid or Acetic Anhydride Calculation for Limiting Reactant: 3. Theoretical yield of aspirin (9) Calculation for Theoretical Yield of aspirin: 4. Mass of filter paper 0.3369 N 5. Mass of filter paper + aspirin 2.471g 6. Experimental Yield of aspirin (g) 7. Percent Yield Synthesis of Aspirin An early oral pain reliever, salicylic acid, was determined to cause stomach...
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...
question 4 & 5 Question 4 (2 points) if you accidently read the procedure wrong while doing the synthesis of asp...
question 4 & 5
Question 4 (2 points) if you accidently read the procedure wrong while doing the synthesis of aspirin and mixed Sg of salicylic acid with 2 mL of acetic anhydride (instead of correctly mixing 2g of salicylic acid with 5 mL of acetic anhydride), what would be the effect7(density of acetic anhydride = 1.082 g/mL) a Nothing, it would still work just fine Ob Reaction would work fine, but less product would form since acetic anhydride is...
DATA Part A: Synthesis of Aspirin Mass of salicylic acid Mass of watch glass Mass of watch glass + dry product Calculated mass of dry product Melting range of product Addition of FeCl, to salicylic acid Addition of FeCl, to product Theoretical yield of aspirin Show calculation: Percent yield of aspina product Show calculation: Lab 9 . Formation o Section LAB 9 REFLECTIVE EXERCISES Date 1 What data did you collect to indicate that you successfully produced aspirn? What did...
Pre-lab Assignment: Synthesis of Aspirin 1. What is the chemical name for aspirin? 2. How does aspirin work in the human body? 3. What is the name of the compound that was isolated from the bark of the willow and had a similar effect as aspirin? 4, what is a common side effect of the compound from #4? 5. Draw and label the complete setup to perform vacuum filtration. 6. What is the theoretical yield for aspirin if you start...
Name Lab Partner Lab Section Date Lab 9 DATA Part A: Synthesis of Aspirin Mass of salicylic acid 1.047 g Mass of watch glass 37.3959 Mass of watch glass + dry product 38.1409 Calculated mass of dry product 0.7459 Melting range of product 136-140 Addition of FeCl, to salicylic acid Addition of FeCl, to product Theoretical yield of aspirin Show calculation: Percent yield of aspirin product Show calculation:
Lab Section Nume Preparation and Examination of a Drug: Aspirin EXPERIMENT 25 OBSERVATIONS AND RESULTS 1. The Synthesis of Aspirin Record the weight of your aspirin, and calculate the percentage yield. Base the yield on salicylic acid since we acetic anhydride was used. Show all calculations. Weight of aspirin d. 08035 Yield of aspirin 2. Contaminants in Aspirin What was the color of the salicylic acid-ferric chloride test solution? On the basis of color is either your aspirin or commercial...
A similar pain reliever to aspirin is acetaminophen, which can be synthesized following a similar reaction scheme seen below. - H₂C H₂C HO NH. MH =0 + o + -cн, но p-Aminophenol нас Acetic anhydride Acetaminophen Acetic Acid a. If 2.00g of p-Aminophenol ( 109.1 g/mol) reacts with 5.00 mL of acetic anhydride (102.1 g/mol and density - 1.08 g/mL), what mass of acetaminophen (180.2 g/mol) would be made? Show all calculations. Mass of acetaminophen: b. If you only isolated...
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 Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of when working with the following chemicals? a. Acetic anhydride b. Concentrated sulfuric acid 2. Explain the following terms as they relate to this experiment. a. Catalyst b. Limiting reactant 3. Following the procedure described in this experiment, a student reacted 2.775 g of salicylic acid with 4.0 ml of acetic anhydride and recovered 2.986 g of aspirin. a. Calculate the number of moles...
1. Mass of salicylic acid (g) 2.0089 5.10ml & 2. Volume of acetic anhydride (mL) Limiting reactant is (circle one): Salicylic Acid or Acetic Anhydride Calculation for Limiting Reactant: 3. Theoretical yield of aspirin (9) Calculation for Theoretical Yield of aspirin: 4. Mass of filter paper 0.3369 N 5. Mass of filter paper + aspirin 2.471g 6. Experimental Yield of aspirin (g) 7. Percent Yield Synthesis of Aspirin An early oral pain reliever, salicylic acid, was determined to cause stomach...
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...
question 4 & 5
Question 4 (2 points) if you accidently read the procedure wrong while doing the synthesis of aspirin and mixed Sg of salicylic acid with 2 mL of acetic anhydride (instead of correctly mixing 2g of salicylic acid with 5 mL of acetic anhydride), what would be the effect7(density of acetic anhydride = 1.082 g/mL) a Nothing, it would still work just fine Ob Reaction would work fine, but less product would form since acetic anhydride is...
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