- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 1 (12.16 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 2 (12.08 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 3 (15.27 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 4 (17.12 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 5 (40.55 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 6 (23.98 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 7 (15.33 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 8 (13.1 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 9 (14.71 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 10 (18.46 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 11 (12.05 KiB) Viewed 56 times
- Synthesis Of Aspirin From The Procedure 1 Obtain A Hotplate 400 Ml Beaker And 125 Ml Flask 2 Prepare A Warm Water B 12 (10.8 KiB) Viewed 56 times
O 87.973, -0/1- 87.973
Mass of Elenmeyer flask + salicylic acid (g) 89.978 Ⓒ -0/T- 89.978
From the procedure 5. Working in a fume hood, carefully add 5 mL of acetic anhydride to the flask. Volume of acetic anhydride used (mL) Graduated cylinder reading 5.1
6. Slowly add 10 drops of 85% phosphoric acid, H₂PO4 7. Stir the mixture with a stirring rod. 8. Place the flask in the boiling water bath and stir until the solid dissolves. 9. Once the solid dissolves, remove the flask from the water bath and allow it to cool to room temperature. 10. Allow the reaction mixture in the beaker to cool to room temperature. 11. While your reaction is cooling, obtain a 400 mL beaker and prepare an ice-water bath. 12. Working in a fume hood, carefully add 20 drops of water to the cooled mixture. 13. Once the reaction is complete, and no further change is observed, add 50 mL of cold water. 14. Place the flask into the ice bath for about 10 minutes to cool the mixture. 15. Stir gently. Aspirin will precipitate from solution. If no crystals form, gently scratch the inside of the flask with the stirring rod. Aspirin Collection - Vacuum Filtration From the procedure 1. Obtain the necessary glassware and equipment to assemble the vacuum filtration apparatus in Figure A.3 in the lab manual. 2. Securely clamp a clean filter flask to the ring stand. The filter flask should be larger than the flask containing the solution you are about to filter. 3. Attach a piece of heavy-walled tubing onto the sidearm of the flask. Connect the tubing to the water aspirator. 4. Put a filter adapter on top of the filter flask and then place the funnel in the filter flask. Ensure that the neck of the funnel fits snugly in a rubber washer. 5. Add a piece of filter paper just large enough to cover the holes in the bottom of the funnel. Make sure the filter paper is flat and does not curl up at the sides. 6. Carefully wet the filter paper using clean, ice-cold water to help the filter paper stick to the bottom of the Büchner funnel. 7. Turn on the
wet the to help the filter paper stick to the 7. Turn on the vacuum and slowly pour the solution with the aspirin crystals onto the center of the filter paper. 8. If any crystals remain in the flask, transfer them to the funnel using a spatula. Rinse the inside of the flask with ice-cold water and pour it onto the funnel. om of the Buchner funnel. 9. Rinse the crystals collected with two 10 mL rinses of cold water. Spread the crystals out on the filter paper to aid in drying. 10. Once the liquid has been removed, turn off the vacuum before disconnecting the tubing. Hold the funnel in place and disconnect the hose from the water aspirator and then turn off the water. If you turn off the water before you disconnect the tubing, water will back up into your filtrate. 11. Carefully remove the filter paper from the flask using a spatula and place the filter paper with the crystals on a paper towel and allow the crystals to air dry. 12. Weigh a clean and dry watch glass. Record the mass.
29.869 +0/T- Analysis of Aspirin and Other Analgesics - Thin Layer Chromatography You have been assigned the unknown number 4, 29.869
Analysis of Aspirin and Other Analgesics - Thin Layer Chromatography You have been assigned the unknown number 4. Enter your unknown number: (1pts) Aspirin Collection - Vacuum Filtration, Contd. From the procedure 13. Transfer your aspirin product to the watch glass, weigh and record the mass.
(1pts) Mass of watchglass + dried aspirin product (g) 32.249, O +O/T- 32.249 Saved
(19pts) Calculation of Yields Mass of Erlenmeyer flask + salicylic acid: Mass of empty Erlenmeyer flask (1pts) Mass of salicylic acid used (g) (2pts) Moles of salicylic acid (mol) Volume of acetic anhydride: (2pts) Moles of acetic anhydride (mol) note: the density of acetic anhydride is 1.08 g/m (2pts) What is the limiting reactant? 2.008 0.014538 0.052941 salicylic acid 89.978 g 87.973 g 5.10 mL Saved Saved A
Mass of empty watchglass: (1pts) Mass of aspirin obtained (g) (2pts) Moles of aspirin obtained (mol) (3pts) Aspirin theoretical yield (g) (2pts) Product percent yield. 29.869 g
(4pts) Is your percent yield within reason of what you would expect? Explain your answer. BIU Normal : X₁ X¹- → BES e 1711 Ix