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Investigate physical and chemical properties of known and unknown substances via quantitative and qualitative analysis through purification techniques such as melting point determination, recrystallization, and sublimation.
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Introduction We investigated physical and chemical properties of known and unknown substances via quantitative and qualitative analysis through purification techniques such as melting point determination, recrystallization, and sublimation. The melting point determination, recrystallization, and sublimation compounds involved the experiments were: Adipic Acid, Brown Sugar, and 1,4-dichlorobenzene, respectively. Procedure Part A: Sublimation Impure 1,4-dichlorobenzene (26 g) was measured out and the impure compound was sublimed as per the methods given on page 10 of the Chemistry 3350: Organic Chemistry Laboratory Manual, Ed. 6(Morante, 2004). However, due to time constraints, it was decided to complete this portion of the lab experiments first and not to determine melting point of pure compound sublimed. Part B: Recrystallization Brown sugar (1.74 g) was measured and transferred to a preweighed test tube where the substance undergo recrystallization as outlined on page 9 of the Chemistry 3350: Organic Chemistry Laboratory Manual, Ed. 6(Morante, 2004). Part C: Melting Point Determination An unknown sample...
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