Identifying an Unknown Solid through Recrystallization and Melting Point

Identifying an Unknown Solid through Recrystallization and Melting Point

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Hobbs, April Experiment 1-Recrystallization Organic Chemistry I Lab Identifying an Unknown Solid through Recrystallization and Melting Point Introduction In this experiment, an unknown solid sample will be identified. This will be carried out by first recrystallizing the solid. This involves the process of heating and cooling the solid with a specific solvent (in this experiment, water), and then removing all impurities. Once impurities are removed, it is now a pure solid. The pure solid will then be identified by determining its melting point (range) and comparing it to the melting points of other identified solids given in the table in the lab manual. In order to have less error in this experiment, we will compare our results with other classmates with the same unknown solid. The purpose of this experiment is to understand the processes of recrystallizing solids and determining melting points using the techniques explained in
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Unformatted text preview: our lab manual. Table of Reagents Compound Molecular Weight (g/ mol) Melting point (C) vanilin 152.15 83 Ethyl 3,5-dinitrobenzoate 226.14 95 o-toluic acid 136.15 105 Acetanilide 135.17 115 Benzoic Acid 122.12 122 benzamide 121.14 130 m-nitrobenzoic acid 167.12 142 o-nitrobenzoic acid 166.17 148 Salicylic Acid 138.10 161 o-nitrobenzamide 166.13 178 p-anisic acid 152.14 185 Safety Information The unknown compounds in this experiment can be very dangerous if used without caution. These solids may cause eye irritation and respiratory tract irritation. Hobbs, April Experiment 1-Recrystallization Organic Chemistry I Lab Therefore, it is necessary to ALWAYS wear you lab glasses and always close the containers to avoid inhalation. Most importantly, wear the appropriate attire for lab to avoid skin irritation....
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Identifying an Unknown Solid through Recrystallization and Melting Point

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