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How will you demonstrate the purity of your final product (crude or recrystallized)?

How will you demonstrate the purity of your final product (crude or recrystallized)?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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ANALYSIS 14. Prepare a drying-apparatus that uses the water aspirator on the bench. Transfer the Büchner with your solid (crude or recrystallized) to this setup. Dry the solid for approximately 10 minutes. Break the solíd clumps apart every now and then with a spatula to accelerate the drying process. 15. Weigh the dried solid so as to calculate a reaction yield for your report. 16. Demonstrate the identity and purity of your acetaminophen product (crude and purified, if you were able to recrystallize it) using: TLC: Dissolve a small amount (~10 mg; the tip of a spatula) in a small volume of ethyl acetate (~1-2 mL) in a test tube before spotting on your plate and eluting. Melting point analysis: Pure acetaminophen melts at 169 °C. Pack a small amount (~ 2 mm of height) of solid in a melting point capillary, and record a melting point using the appropriate apparatus. Heat rapidly at first, but slow down when you get near (~20° below) the target melting point to obtain a more accurate measurement. How will you demonstrate the purity of your final product (crude or recrystallized)?
Transcribed Image Text:ANALYSIS 14. Prepare a drying-apparatus that uses the water aspirator on the bench. Transfer the Büchner with your solid (crude or recrystallized) to this setup. Dry the solid for approximately 10 minutes. Break the solíd clumps apart every now and then with a spatula to accelerate the drying process. 15. Weigh the dried solid so as to calculate a reaction yield for your report. 16. Demonstrate the identity and purity of your acetaminophen product (crude and purified, if you were able to recrystallize it) using: TLC: Dissolve a small amount (~10 mg; the tip of a spatula) in a small volume of ethyl acetate (~1-2 mL) in a test tube before spotting on your plate and eluting. Melting point analysis: Pure acetaminophen melts at 169 °C. Pack a small amount (~ 2 mm of height) of solid in a melting point capillary, and record a melting point using the appropriate apparatus. Heat rapidly at first, but slow down when you get near (~20° below) the target melting point to obtain a more accurate measurement. How will you demonstrate the purity of your final product (crude or recrystallized)?
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