Friday, April 29, 2011

Lab 10.3: Titration and Colligative Properties (Due Wed 5/4)

Titration Section

In this part of the experiment you had to do a titration to determine the concentration of the base (NaOH). In the process of the titration you produced three separate pieces of data and calculated the deviation.

Describe how far apart your different measurements were. Did they vary a lot? Were you surprised in how much variation that you found. Can you think of any ways that your actions during the titration may have caused issues with your values? What could you have done to make your trials more consistent across the board?

Colligative Properties Section

In this section you were asked to investigate some real examples of the colligative property at work.

Antifreeze is used in engines as a coolant. They take advantage of both the freezing point depression and boiling point elevation. Come up with a reason why each of these are important based on the variable climate that we live in.

The reason these processes work is due to the attractions that take place between the solute molecules and the solvent molecules. Describe how the attractions cause the freezing point depression and how they also cause the boiling point elevation.

Enrichement:
 Find another application of the colligative properties. Find a real world use, some hints: One is used in the making of a tasty treat that we will actually do later in the year. Describe how the process works for the example that you find.

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