II. Results Analysis
A. DataPlease refer to Attachment 1 for all reconciled data.B. DiscussionPart I Determine the Freezing Temperature of Pure Lauric Acid The apparatus for determining the freezing point was set up as follows: a ring stand was set up with a hot plate on top, a 400 mL beaker was filled with 300mL of water and placed on top of the hot plate, a 18 x150 test tube was placed on top of the beaker using a utility clamp which was clamped on to the ring stand, the temperature probe was placed in the test tube. At this point, we measured 4.004 grams of solid lauric acid and placed it in the test tube, the test tube was then submerged in a hot water bath (50°C). Not only the temperature of the water but the continuous stirring with the temperature probe facilitated the melting of the lauric acid into its liquid phase. Whenthe temperature of the lauric acid was at approximately 50°C, the test tube was quickly taken out of the water bath. In this way the test tube was then exposed to the room temperature. While collecting the data on the Vernier software for 10 minutes we observed how the lauric acid began to solidify as we kept stirring with the probe and noticed the curve made by the decrease in the temperature on the generated graph (see fig. 1). It was necessary to Figure 1The Cooling Curve of Pure Lauric Acid
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- Fall '15
- Yufeng Wei
- Freezing-point depression, Lauric acid