postlab7 - Lamine Sissoko Discussion Post-Lab 7 Chem 1310...

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Lamine Sissoko Post-Lab 7 Chem 1310 – I6 Discussion This experiment consisted of two setups and two main time trials to find freezing point depressions. The first was for distilled water, which was found after placing a test tube with 10ml of distilled water in an ice bath, and using a CBL2/TI device to collect temperature readings of the solution over 450 seconds. The second setup was the same setup, but for an unknown solution instead of water. This time, in addition to the 10ml of distilled water was 0.491 grams of an unknown substance. This second solution’s temperature was also tracked in the same manner for 450 seconds. The freezing points obtained after both time trials were used to calculate the freezing point depression = - ∆T Tpure solvent Tsolution . The results show that a pure solution’s freezing point is lowered after a solute is dissolved in it. Knowing the freezing point depression, 1.9, and pure water’s freezing point depression constant, Kf=1.86 * . ℃ kg mol
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This note was uploaded on 03/08/2010 for the course CHEMISTRY 1310 taught by Professor Williams during the Spring '10 term at Georgia Institute of Technology.

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postlab7 - Lamine Sissoko Discussion Post-Lab 7 Chem 1310...

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