The temperature then rises up and either stays at the freezing point, in the case of the pure substance, or slowly falls as the solution freezes.
Obtain and wear goggles. Pulverize a small amount of the mixture of BHT and cetyl alcohol that was prepared by your instructor.
Then open the experiment file that matches the probe you are using. The following data was obtained in an experiment designed to find the molar mass of a solute by freezing point depression. Submitted by alexjames13 on Tue, 2012-10-02 15: Stir well to be sure that the solution is homogenous.
The unknown is added to BHT, the freezing point depression of this solution is measured, and the molar mass of the unknown is then determined. Freezing Point Time 13.
Pulverize a small amount about 0. Benzoic acid occurs naturally as do its esters in many plant and animal species.
Otherwise, it is relatively uncommon. Percentage By Mass Calculation S. What are colligative properties?
Do not attempt to pull the probe out— this might damage it. Examine the freezing curves for each.
AP6356, from Flinn Scientific, Inc. Email Fax List. The following errors occurred when the above experiment was carried out. Click OK.
Soaps are not made directly from stearic acid, but indirectly by saponification of triglycerides consisting of stearic acid esters. But most of the increase is attributable to an increase in high-density lipoprotein HDL the "good" blood cholesterol.
As you move the mouse cursor across the graph, the temperature y and time x data points are displayed in the examine box on the graph.
Why is it advantageous to choose a solvent which has a large value for K f?