Muy, Emelie Experiment 1: Solubility and Melting Point In Experiment 1, the solubility and melting points of organic compounds with different chemical and physical properties including polarity and varying chain lengths were obtained through tests in different solutions. In order of increasing polarity, hexane, methanol, and water were the solvents used to determine the solubility and melting points. The closer the polarity of the solvents to the solutes, the more likely they would dissolve or mix as predicted from “like dissolves like”. On the other hand, the melting point ranges were determined by the impurities found in each product, the more impurities in a compound, the broader the melting point range. In part 1, the solubility of benzophenone, malonic acid, and biphenyl were each tested in water, hexane, and methanol respectively. In water, benzophenone and biphenyl were insoluble while malonic acid was soluble. In methanol, all three were soluble, however, biphenyl appeared to be only partially soluble probably due to its aromaticity. In hexane, both benzophenone and biphenyl were soluble while malonic acid was not. The aromatic rings were found to be less soluble in polar solvents like water and more soluble in nonpolar carbon chains like hexane. On
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