Experiment 3

Experiment 3 - Vanessa Chew Chem 3AL October 3, 2010...

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Chem 3AL October 3, 2010 Experiment 3: Mixed Melting Points Discussion Because the melting point of a mixture is lower than that of both pure solids, if the mixed melting point was depressed (as was observed), it implied that the solids were different. Conversely, if the mixed melting point was near identical to that of both pure solids, it implied that the solids were identical. The data obtained from the mixed melting point experiments is summarized in Table 1 . Table 1 a Melting point ranges of triphenylmethane and naphthalene in varying ratios %A %B temperature (ºC) average temperature of final point (ºC) 100 0 92.1–93.2 92.4 89.1–91.5 90 10 87.5–91.2 91.2 87.8–91.1 80 20 51.2–72.8 72.0 50.2–71.1 70 30 49.5–52.1 51.8 49.5–51.3 50.0–52.0 60 40 50.3–52.0 52.1 50.6–52.2 50 50 50.3–52.3 52.3 50.2–52.3 40 60 51.1–52.6 53.0 50.9–53.3 30 70 50.1–54.0 55.8 50.1–57.5 20 80 49.8–52.5 52.2 49.6–51.8 10 90 66.3–68.0 70.8 67.3–73.5 0 100 78.0–81.0
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Experiment 3 - Vanessa Chew Chem 3AL October 3, 2010...

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