Thursday, March 19, 2009 - Block 4A

Three students went to front of class and discussed the heating lab.

I asked for the general statement of the lab. Students made a graph of the heating curve as their hypothesis so the general statement is to determine the heating curve for water.

On the graph, students indicated what phases they had and what process was going on.

I summarized the results and showed that the heating curves can be used to identify different liquids.

Drew the experimental set-up for distillation. Showed that if you have 2 liquids you should use 3 test tubes and if you have 3 liquids you should use 5 test tubes.

Also sketched out the mothball lab. Showed the set-up. Students predicted the heating and cooling curve, phases for each section, and the process.

Handed out RA 2.1b, RA 2.2a

Students did really well today. I should have done a more fun activity instead of these reading assignments.

Students worked on these for the remainder of the class.