Another look at freezing temperature

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Figure 1

Introduction In Experiment 15: Freezing and Melting of Water, we saw that the temperature of pure water remains constant at its freezing temperature during the freezing and melting process. Now we are going to observe the freezing process of phenyl salicylate. Furthermore, we will observe the effect on the freezing point, when a small amount of another substance (e.g. benzoic acid) is dissolved in the phenyl salicylate.

Equipment 

einstein™Tablet with MiLAB or Android /IOS tablet with MiLAB and einstein™LabMate

Three Temperature sensors (-40°C to 140°C)

1 liter (or larger) Beaker

Test tube with 2 g phenyl salicylate

Test tube with 2 g phenyl salicylate and a few milligrams of benzoic acid

Glass rod for stirring

Safety goggles


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