lab report 1 - Melissa Henkel Amanda Chem 3361L/05 25...

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Melissa Henkel Amanda?? Chem 3361L/05 25 September 2007 Acid-Base Reactions: Separation of Pain Reliever Components Data: Table1: Experimentally determined amounts Amount/g Melting points o C Accepted melting point o C Phenacetin .518g 106-127 135 Aspirin .085g 107-126 135 Caffeine .053g 200+ 238 Table 2: Percent yield calculations Percent yield Phenacetin .518g / .486g * 100 = 106.58 % Aspirin .085g / .68g * 100 = 12.5% Caffeine .053g / .097 * 100 = 54.64% Table 3: Reagents used molarity amoount In water density HCl 4 M 40ml soluble .909 Sodium bicarbonate .5M 50ml soluble 2.159
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Table 4: Phenaceitin IR Peak (cm^-1) Identification 2825 C-H 2546 C-H 1751 C=0 1677 C=O 1604 N-H Table 5: Aspirin IR Peak (cm^-1) Identification 2963 C-H 2582 C-H 1751 C=O 1679 C=O 1605 N-H Table 6: Caffeine Peak (cm^-1) Identification 3111 C-H 2960 C-H 1692 C=O 1643 N-H 1546 C=O RING Discussion: This lab was designed to extract molecules from a whole through the manipulation of its solubility after an acid base reaction was preformed. Once the molecules were separated physical properties were tested. IR spectrometry and boiling point evaluation were preformed to determine the purity of the sample.
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