Lab Notebook Aspirin and Other Analgesics PDF

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Alb notebook with answers and descriptions for the aspirin and other analgesics lab for organic chem 1....

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Lab Notebook Aspirin and Other Analgesics Data Mass of flask (g) - 79.28g Mass of flask + salicylic acid(g) - 80.83g Mass of watch glass (g) - 109.33g Mass of watch glass and aspirin product (g) - 110.78g 0.15% salicylic acid - 3.9ph Commercial aspirin - 3.4ph Buffered aspirin - 5.5ph Aspirin product - 4.6ph Enter your unknown number - 3 Calculation and Analysis Mass of salicylic acid (g) – 1.55g 80.83 – 79.28 = 1.55g Mass of aspirin product (g) – 1.45g 110.78 – 109.33 = 1.45g Maximum theoretical yield of aspirin (g) – 2.022g 1.55g / 138.121g/mol = .0112mol = . 0112mol * 180.158g/mol = 2.022g Percent yield of aspirin – 76.7% 1.45g / 2.022g * 100 = 71.7% Look up the melting point of aspirin product (°C) – 134-136°C Purity of Aspirin Synthesized 1. FeCl3 reacts with a phenol to produce a positive result and become purple 2. The purity of the product is low, since the color with FeCl3 is in between purple and yellow, meaning that there is a mixture of molecules with and without phenols.

Analysis of Analgesics Enter the distance of the solvent (cm) – 6.0cm Spot #1: Aspirin: Moved 1.7cm Rf Value 1.7/6.0 = .28 Spot #2: Ibuprofen: Moved 4.7cm Rf Value 4.7/6.0 = .78 Spot #3: Acetaminophen: Moved 3.8cm Rf Value 3.8/6.0 = .63 Spot #4: Caffeine: Moved 1.4cm Rf Value 1.4/6.0 = .23 Spot #5: Naproxen: Moved 4.8cm Rf Value 4.8/6.0 = .80 Spot #6: Unknown: Moved 3.9cm Rf Value 3.9/6.0 = .65...