Experiment 16 - Molecular Mass from Freezing Point

Experiment 16 - Molecular Mass from Freezing Point -...

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EXPERIMENT 16 - MOLECULAR MASS FROM FREEZING POINT DEPRESSION REPORT SHEET NAME DATE 2/11/08 LAB DAY None TIME None Data Mass of Naphthalene 20.019 ± 0.005 g Mass of Sulfur 1.988 ± 0.005 g Naphthalene solution Naphthalene-Sulfur solution Time (sec) Temp ( ° C) Time (sec) Temp ( ° C) xxxxxx Trial #1 Trial #2 xxxxxx Trial #1 Trial #2 15 82.3 83.4 15 82.8 82.5 30 80.8 81.1 30 80.7 80.1 45 80.0 80.1 45 79.2 78.7 60 79.9 80.0 60 77.9 78.2 75 79.9 79.9 75 77.2 77.4 90 79.9 79.9 90 77.1 77.1 105 79.9 79.9 105 77.1 77.1 120 79.9 79.9 120 77.1 77.1 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
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# # # # # # Results From the plot of Temperature vs. Time, obtain the Freezing points of the naphthalene and the naphthalene-sulfur solution. Record these values in the appropriate spaces below. Trial #1 Trial #2 Freezing point of naphthalene 79.9 79.9 ° C Freezing point of the naphthalene-sulfur solution 77.1 77.1 ° C Freezing point lowering,
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Experiment 16 - Molecular Mass from Freezing Point -...

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