SC CHEM 333 - Chemical Extraction Post-Lab (7 pages)

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Chemical Extraction Post-Lab



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Organic Chemistry 333L section 03M Laboratory Post Lab Chemical Extraction By Cameron Kahn 14 January 2019 TA James Collie 1 Page Observations In the chemical extraction experiment he she took four 4 test tubes and added a liquid solution to each one During the experiment the test tubes changed colors Below is a table and the color changes that were observed Test Tube Colors Test Tube Before mixing A Clear liquid B Orange brown C Light orange yellow D Liquid orange white After mixing Clear liquid with white pieces Brown orange on top cream white on bottom Orange with MgSO4 cluster Solid orange white Final product White powder crystals Very light orange white Separated into test tube D Crystal yellowish light brownish The starting ternary compound a light brown and white powder mixture was added to a large test tube Next ether was added and a distinctive odor smell was noted and white pieces were seen When hydrochloric acid was added to the test tube bubbles and precipitate formed Finally when adding magnesium sulfate lumps of magnesium sulfate observed on the bottom of the test tube See the extraction flow diagram for a visual reference of the process for the experiment both diagrams came from George Handy s lab manual and I do not take credit for making them 2 Page Results The initial mass of the ternary mixture was 1 030 grams g The Mass of benzoic acid recorded minus the filter paper was 0 277 g The melting point of benzoic acid recorded was 121 4 C and percentage composition was 26 89 The mass of 2 naphthol minus the filter paper was 0 125 g The melting point of 2 naphthol record was 95 30 C and percentage composition 12 14 The 3 Page Mass of naphthalene minus the mass of the test tube was recorded to be 0 324 g The melting point of naphthalene record was 71 1 C and the percent composition was 31 46 The total final mass of the ternary mixture was 0 726 g Therefore the percent recovery of the ternary mixture was 70 49 Calculations Chemicals Benzoic Acid 2 Naphtol



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