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Caffeine NaHCO 3 3 M HCl 3 M HCl 0.5 M NaHCO 3 Aspirin x 100% = 8.15% error x 100% = 6.67% error x 100% = 1.68% error Acid-Base Reactions: Separation of Pain Reliever Components Data: Figure 1: Separation of Caffeine Figure 2: Separation of Aspirin Figure 3: Structure of Phenacetin Table 1: IR Spectrum Peak Results Peak Functional Group Aspirin 2865.82 cm-1 Alcohol 3113.92 cm-1 sp 2 C 1751.51 cm-1 C=O 1605.34 cm-1 C=C 1662.72 cm-1 C=O Caffeine 3111.70 cm-1 sp 2 C 2955.53 cm-1 sp 3 C 1692.70 cm-1 C=O 1645.92 cm-1 C=O Phenacetin 3103.79 cm-1 sp 2 C 2951.25 cm-1 sp 3 C 1649.31 cm-1 C=O 1694.15 cm-1 C=O Table 2: Data from the Experiment Aspirin Phenacetin Caffeine Chemical Formula C 9 H 8 O 4 2 C 10 H 13 NO 2 3 C 8 H 10 N 4 O 2 4 Weight of Flask 73.177 g 72.455 75.984 Weight After Crystallization 73.692 g 72.665 g 76.011 g Weight of Crystals 0.210 g 0.515 g 0.027 g Starting Melting Point 115 C 110 C 223 C End Melting Point 124 C 126 C 234 C Literature Melting Point 135 C 1 135 C 1 238 C 1 Percent Error 8.15% 6.67% 1.68% Unknown ___B ___ Percent Error: Aspirin Melting Point: |124-135| 135 Phenacetin Melting Point: |126-135| 135 Caffeine Melting Point: |234-248| 238 Amount of Each Chemical Used: 35 mL chloroform (CHCl 2 ) 25 mL 0.5 M NaHCO 3 33.67 mL 3 M HCl 7 g NaHCO 3 >1 g anhydrous MgSO 4 Discussion: This lab was done in order to separate APC tablets into its different components to establish which components were present. Understanding the differences in solubility of each component in pain relievers will aid in separating each from the mixture. If one solution is soluble in an organic solvent, and others are soluble in water, the components can begin to be ... View Full Document

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