Homework Answers
1✅you add FeCl3 to an aspirin sample and check for phenol group
✅ If solution changes colour to purple it means some phenol group remains unreacted
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W cepted. Please do not ask for special treatment. 1. The starting material for aspirin is...
need help on 1,2,3,4 1. The starting material for aspirin is salicylic acid which is a...
need help on 1,2,3,4
1. The starting material for aspirin is salicylic acid which is a phenol. • (2 pts) Which chemical test will you use to test for unreacted phenol when the aspirin synthesis is completed? (It's a chemical test you have used earlier in the semester) (2 pts) What does a positive test for phenol look like using this test? 2. When finding a melting point experimentally, it is always reported as a range T1-T2. 2a. (3 pts)...
i did the synthesis of aspirin experiment and got the data below. how do you do...
i did the synthesis of aspirin experiment and got the data
below. how do you do the theoretical yield? percent yield of the
pure aspirin?
DATA: Mass of Salicylic Acid: 2.034g Volume of Acetic Anhydride used in synthesis: 4.00ml Mass of filter paper: 0.196g Mass of filter paper plus Aspirin: 1.868g Mass of Aspirin: 1.672g Percent Yield of Pure Aspirin: I Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also...
please help me ! do you think this is good so far ? Results/Data • Aspirin...
please help me ! do you think this is good so far ?
Results/Data • Aspirin synthesis salicylic acid: 2.0 g Acetic anhydride: 2 mL d= 1.082g/mL sodium acetate: 0.4 g • Experimental yield of aspirin: 2.4 g FORMATION OF ESTERS II. PREPARATION OF ACETYL SALICYLIC ACID (ASPIRIN): 1 Complete the table below by entering appropriate values into the empty boxes. Show calculations for all entries clearly below. Reactants Chemical MW Grams of Moles of Moles of Limiting Melting Formula...
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...
Please help me answer questions #1 through #12. Lab information and results are listed to the...
Please help me answer questions #1 through #12. Lab information
and results are listed to the right side. Thank you!
Paragraph . 1マーに 1 HTTL 2 | x' x, | so ea l E 1ヨ回ドもデ. | 2m 규亨ー过1K % Yield g aspirin obtained/ g aspirin calculated x 100 1. Mass of empty Erlenmeyer Flask,EF 2. Mass of EFsalicylic acid 3. Mass of EF+sslicylic acid + acetic anhydride 4. Mass of E 5. Calculate mass of salicylic acid used 8. Calculate...
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...
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...
please answer all parts I am trying to check my answers. Recrystallization of Acetanilide Recrystallization is...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
can someone please answer number one? im so lost DYES AND DYEING CHAPTER 1. Calculate the...
can someone please answer number one? im so lost
DYES AND DYEING CHAPTER 1. Calculate the amounts of salicylic acid, 1-naphthol, 2-naphthol, 8-anilino-1-naph- thalenesulfonic acid ammonium salt, or N,N-dimethylaniline needed for Part 1B of this experiment (use molecules as assigned by your TA). 190mg 3-aminobenzene 2.5mL Sulfonic acid 2.5% sodium carbonate solution 81mg Sodium nitrate 2. What is the purpose of the sodium carbonate in Part 1A? Why do we add glacial acetic acid in Part 13 when we react...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
need help on 1,2,3,4
1. The starting material for aspirin is salicylic acid which is a phenol. • (2 pts) Which chemical test will you use to test for unreacted phenol when the aspirin synthesis is completed? (It's a chemical test you have used earlier in the semester) (2 pts) What does a positive test for phenol look like using this test? 2. When finding a melting point experimentally, it is always reported as a range T1-T2. 2a. (3 pts)...
i did the synthesis of aspirin experiment and got the data
below. how do you do the theoretical yield? percent yield of the
pure aspirin?
DATA: Mass of Salicylic Acid: 2.034g Volume of Acetic Anhydride used in synthesis: 4.00ml Mass of filter paper: 0.196g Mass of filter paper plus Aspirin: 1.868g Mass of Aspirin: 1.672g Percent Yield of Pure Aspirin: I Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also...
please help me ! do you think this is good so far ?
Results/Data • Aspirin synthesis salicylic acid: 2.0 g Acetic anhydride: 2 mL d= 1.082g/mL sodium acetate: 0.4 g • Experimental yield of aspirin: 2.4 g FORMATION OF ESTERS II. PREPARATION OF ACETYL SALICYLIC ACID (ASPIRIN): 1 Complete the table below by entering appropriate values into the empty boxes. Show calculations for all entries clearly below. Reactants Chemical MW Grams of Moles of Moles of Limiting Melting Formula...
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...
Please help me answer questions #1 through #12. Lab information
and results are listed to the right side. Thank you!
Paragraph . 1マーに 1 HTTL 2 | x' x, | so ea l E 1ヨ回ドもデ. | 2m 규亨ー过1K % Yield g aspirin obtained/ g aspirin calculated x 100 1. Mass of empty Erlenmeyer Flask,EF 2. Mass of EFsalicylic acid 3. Mass of EF+sslicylic acid + acetic anhydride 4. Mass of E 5. Calculate mass of salicylic acid used 8. Calculate...
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...
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...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
can someone please answer number one? im so lost
DYES AND DYEING CHAPTER 1. Calculate the amounts of salicylic acid, 1-naphthol, 2-naphthol, 8-anilino-1-naph- thalenesulfonic acid ammonium salt, or N,N-dimethylaniline needed for Part 1B of this experiment (use molecules as assigned by your TA). 190mg 3-aminobenzene 2.5mL Sulfonic acid 2.5% sodium carbonate solution 81mg Sodium nitrate 2. What is the purpose of the sodium carbonate in Part 1A? Why do we add glacial acetic acid in Part 13 when we react...
(4 pts) (4 pts) (4 pts) (1 pts) 5. Calculations 6. Conclusions 7. Post lab Questions 8. TA signature POST LAB QUESTIONS: 1. Why do we add methanol to the reaction if we see a purple ring? 2. What reaction is occurring with the methanol (show reaction)? Does this reactior affect your product? 3. Why do you get a precipitate when adding the HCl to make the solution acidic? Exp 8-5 Experiment 8: Preparation of Adipic Acid from Cyclohexene Oxidation...
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