Organic Chemistry Laboratory Work
Preparation of Acetylsalicylic Acid (ASPIRIN)
We used Sulfuric Acid for Quesiton 1.
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Organic Chemistry Laboratory Work
Preparation of Acetylsalicylic Acid (ASPIRIN)
We used Sulfuric Acid for Quesiton 1....
PRELAB EXERCISE EXPERIMENT 21 Synthesis of Aspirin (Acetylsalicylic Acid) 1. What is the purpose of sulfuric...
PRELAB EXERCISE EXPERIMENT 21 Synthesis of Aspirin (Acetylsalicylic Acid) What is the purpose of sulfuric acid or phosphoric acid used in the acetylation reaction? Use equations to explain this purpose. The procedure calls for cautious addition of water to the reaction mixture while it is still hot. What purpose does the addition of water serve and why should the addition be done while the reaction mixture is hot? Provide an equation for the reaction involved.Using the quantities of salicylic acid and acetic anhydride...
find the theoretical yield of the acetysalicylic acid . EXPERIMENT 19 PREPARATION OF ASPIRIN In addition...
find the theoretical yield of the acetysalicylic acid .
EXPERIMENT 19 PREPARATION OF ASPIRIN In addition to the Fischer esterification method presented in Experiment 18, a second method for preparation of esters involves the reaction of anhydrides with the hydroxyl This method is ospecialy usoful for tho preparation of acetate esters, since acetic anhydride is an inexpensive and reactive reagent. In this experiment the hydroxyl group of salicylic acid is acetic anhydride to make acetylsalicylic acid, or aspirin. The short...
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...
Student Name: ID#: Date: EXPERIMENT 3 - PREPARATION OF ASPIRIN PRE - LABORATORY ASSESSMENT 1. Could...
Student Name: ID#: Date: EXPERIMENT 3 - PREPARATION OF ASPIRIN PRE - LABORATORY ASSESSMENT 1. Could you have used acetyl bromide (CH3COOBr) instead of acetic anhydride in this reaction? Explain. Draw a diagram showing any intermolecular hydrogen bonds possible in the product molecule? ID: Date: Student Name EXPERIMENT 3 - PREPARATION OF ASPIRIN PRE - LABORATORY ASSESSMENT 1. Could you have used acetyl bromide (CH3COOB) instead of acetic anhydride in this reaction? Explain. 2. Draw a diagram showing any intermolecular...
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...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are there in 1.0 grams of salicylic acid? 2. How many moles of acetic anhydride are there in 3 mL of acetic anhydride? 3. When 1.0g of salicylic acid and 3 mL of acetic anhydride react, DETERMINE which one is the limiting reactant (you can go to General Chemistry if you need help about limiting reagent)? 4. What is phosphoric acid used for in the...
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Pr...
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Prepare Stock Solution: Obtain ca. 0.1 g dried acetylsalicylic acid (MM = 180.16 g/mol), accurately weighed, and quantitatively transfer to a 125-ml Erlenmeyer flask. Add 5 ml 1.0 M NaOH and heat mixture to boiling on a hot plate. This will hydrolyze the acetylsalicylic acid to sodium salicylate. If necessary, rinse down the walls of the Erlenmeyer with DI water to ensure complete hydrolysis...
If aspirin (acetylsalicylic acid) is used in a TLC experiment with 1:1 Hexanes / Ethyl acetate...
If aspirin (acetylsalicylic acid) is used in a TLC experiment with 1:1 Hexanes / Ethyl acetate as the solvent system, explain in terms of polarity why the spot would move fast or slow up the TLC plate?
need help answering these questions Chemistry 2211(PRIVATE) LABORATORY PRACTICUM - 4 DO NOT CONSULT WITH OTHER...
need help answering these questions
Chemistry 2211(PRIVATE) LABORATORY PRACTICUM - 4 DO NOT CONSULT WITH OTHER LABORATORY STUDENTS, THE LABORATORY INSTRUCTOR OR GRADUATE ASSISTANT UNLESS AN ISSUE OF SAFETY, EQUIPMENT NEEDS, OR EQUIPMENT FAILURE OCCURS. You may consult your laboratory notebook or the reference books in the laboratory You may take up to 150 minutes to carry out the procedure, complete your notebook writeup on the experiment, and submit to the instructor the notebook and clearly labeled product. THE MATERIALS...
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...
PRELAB EXERCISE EXPERIMENT 21 Synthesis of Aspirin (Acetylsalicylic Acid) What is the purpose of sulfuric acid or phosphoric acid used in the acetylation reaction? Use equations to explain this purpose. The procedure calls for cautious addition of water to the reaction mixture while it is still hot. What purpose does the addition of water serve and why should the addition be done while the reaction mixture is hot? Provide an equation for the reaction involved.Using the quantities of salicylic acid and acetic anhydride...
find the theoretical yield of the acetysalicylic acid .
EXPERIMENT 19 PREPARATION OF ASPIRIN In addition to the Fischer esterification method presented in Experiment 18, a second method for preparation of esters involves the reaction of anhydrides with the hydroxyl This method is ospecialy usoful for tho preparation of acetate esters, since acetic anhydride is an inexpensive and reactive reagent. In this experiment the hydroxyl group of salicylic acid is acetic anhydride to make acetylsalicylic acid, or aspirin. The short...
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...
Student Name: ID#: Date: EXPERIMENT 3 - PREPARATION OF ASPIRIN PRE - LABORATORY ASSESSMENT 1. Could you have used acetyl bromide (CH3COOBr) instead of acetic anhydride in this reaction? Explain. Draw a diagram showing any intermolecular hydrogen bonds possible in the product molecule? ID: Date: Student Name EXPERIMENT 3 - PREPARATION OF ASPIRIN PRE - LABORATORY ASSESSMENT 1. Could you have used acetyl bromide (CH3COOB) instead of acetic anhydride in this reaction? Explain. 2. Draw a diagram showing any intermolecular...
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...
need help answering these questions
Chemistry 2211(PRIVATE) LABORATORY PRACTICUM - 4 DO NOT CONSULT WITH OTHER LABORATORY STUDENTS, THE LABORATORY INSTRUCTOR OR GRADUATE ASSISTANT UNLESS AN ISSUE OF SAFETY, EQUIPMENT NEEDS, OR EQUIPMENT FAILURE OCCURS. You may consult your laboratory notebook or the reference books in the laboratory You may take up to 150 minutes to carry out the procedure, complete your notebook writeup on the experiment, and submit to the instructor the notebook and clearly labeled product. THE MATERIALS...
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...
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