Chemistry Notebook
Name:
Date: 2/25/25
Experiment #: 7
Title: Organic Synthesis
Purpose: The purpose of this experiment is to synthesize the carbon-containing organic
compounds: aspirin, urea, and salicylic acid.
Procedure:
Experiment #1: Synthesizing Aspirin (acetylsalicylic acid)
1. 2 g of salicylic acid was added in a flask.
2. 5 ml of acetic anhydride was measured using a graduated cylinder.
3. The acetic anhydride was added to the flask with salicylic acid.
4. 5 drops of sulfuric acid was added to the flask.
5. The flask was placed in a hot water bath for 15 min.
6. The flask was taken out of the hot water bath.
7. A small amount of water was added to the flask to form the solid aspirin precipitate.
8. The flask was cooled for a few minutes.
9. 40 ml of ice water was placed into the flask.
10. The flask was placed in ice water for a few minutes.
11. The flask was taken out of the ice bath, stirred, and then scratched with a stirring rod in
the bottom of the flask.
12. The flask was placed back on ice water.
13. A suction filtration was set up with tubing attached to another flask to a water aspirator.
14. The suction filtration was turned on and the flask's contents were poured in.
15. The flask was rinsed off and the ice water was poured in.
16. The filtration went on for a few minutes until the solid dried up.
17. Two test tubes were filled with water.
18. Salicylic acid was added to one of the test tubes.
19. A few drops of ferric chloride were added using a pipette.
20. The color change (deep purple) was recorded.
, 21. The aspirin precipitate was added to the other test tube.
22. A few drops of ferric chloride were added using a pipette.
23. The color change (faint, light purple) was recorded.
Experiment #1: Melting Point
1. Aspirin was put in a melting point capillary and then placed inside the Mel
Temp melting point apparatus.
2. The melting point apparatus was turned on and the dial was turned up to
increase the temperature.
3. The aspirin was melted completely and the melting point was recorded.
4. Dry aspirin in a weighing bottle was weighed.
5. The mass of the bottle and the mass of aspirin in the bottle were recorded.
6. The percent yield was calculated.
Experiment #2: Urea Synthesis
1. 1 mol potassium cyanate solution was placed in a flask and 1 mol lead nitrate
solution was placed in another flask.
2. Both solutions were mixed in a beaker.
3. The solution was cooled by placing the beaker in an ice water bath for 15 minutes.
4. The beaker was taken out of the water bath with a solid, white precipitate
(lead cyanate) formed.
5. A suction filtration was set up and the solution was filtered.
6. Ammonium hydroxide was added and boiled for 90 minutes.
7. The beaker was placed in an ice bath to cool down.
8. A melting point apparatus was set up.
9. Urea was put in a melting point capillary tube and melted in the melting point apparatus.
10. The melting point was recorded.
11. Dry urea product was placed in a weighing bottle.
12. The mass of the bottle and the mass of urea in the bottle were recorded.
13. The percent yield was calculated.
Name:
Date: 2/25/25
Experiment #: 7
Title: Organic Synthesis
Purpose: The purpose of this experiment is to synthesize the carbon-containing organic
compounds: aspirin, urea, and salicylic acid.
Procedure:
Experiment #1: Synthesizing Aspirin (acetylsalicylic acid)
1. 2 g of salicylic acid was added in a flask.
2. 5 ml of acetic anhydride was measured using a graduated cylinder.
3. The acetic anhydride was added to the flask with salicylic acid.
4. 5 drops of sulfuric acid was added to the flask.
5. The flask was placed in a hot water bath for 15 min.
6. The flask was taken out of the hot water bath.
7. A small amount of water was added to the flask to form the solid aspirin precipitate.
8. The flask was cooled for a few minutes.
9. 40 ml of ice water was placed into the flask.
10. The flask was placed in ice water for a few minutes.
11. The flask was taken out of the ice bath, stirred, and then scratched with a stirring rod in
the bottom of the flask.
12. The flask was placed back on ice water.
13. A suction filtration was set up with tubing attached to another flask to a water aspirator.
14. The suction filtration was turned on and the flask's contents were poured in.
15. The flask was rinsed off and the ice water was poured in.
16. The filtration went on for a few minutes until the solid dried up.
17. Two test tubes were filled with water.
18. Salicylic acid was added to one of the test tubes.
19. A few drops of ferric chloride were added using a pipette.
20. The color change (deep purple) was recorded.
, 21. The aspirin precipitate was added to the other test tube.
22. A few drops of ferric chloride were added using a pipette.
23. The color change (faint, light purple) was recorded.
Experiment #1: Melting Point
1. Aspirin was put in a melting point capillary and then placed inside the Mel
Temp melting point apparatus.
2. The melting point apparatus was turned on and the dial was turned up to
increase the temperature.
3. The aspirin was melted completely and the melting point was recorded.
4. Dry aspirin in a weighing bottle was weighed.
5. The mass of the bottle and the mass of aspirin in the bottle were recorded.
6. The percent yield was calculated.
Experiment #2: Urea Synthesis
1. 1 mol potassium cyanate solution was placed in a flask and 1 mol lead nitrate
solution was placed in another flask.
2. Both solutions were mixed in a beaker.
3. The solution was cooled by placing the beaker in an ice water bath for 15 minutes.
4. The beaker was taken out of the water bath with a solid, white precipitate
(lead cyanate) formed.
5. A suction filtration was set up and the solution was filtered.
6. Ammonium hydroxide was added and boiled for 90 minutes.
7. The beaker was placed in an ice bath to cool down.
8. A melting point apparatus was set up.
9. Urea was put in a melting point capillary tube and melted in the melting point apparatus.
10. The melting point was recorded.
11. Dry urea product was placed in a weighing bottle.
12. The mass of the bottle and the mass of urea in the bottle were recorded.
13. The percent yield was calculated.
