Wednesday, Feb 20, 2008 -4B

Collected safety contracts from students who had not yet handed them in. We will start the Distillation of Wood Lab on Friday, students who have not handed in a signed safety contract or are not appropriately dressed (need proper footwear that covers the foot) will not be able to participate in the lab.

Safety quiz.
Equipment quiz.

Introduced the Distillation of Wood Lab. It is a two day lab. On the first day we collect a mixture of liquids and on the second day we distill it (separate liquids based on differences in their boiling points).

Showed a sample set-up for Day 1. Explained what would happen. Reviewed some key safety issues. Showed a labeled diagram of the lab set up on the white board.

For homework, students have to prepare a full page, neatly drawn labeled diagram of the lab set-up (color is nice), write up the lab procedure for Day 1, write up the procedure using numbered steps, write up a safety section with seven safety precautions in bullet point format.

Students practiced setting up the equipment. After I checked their set-up, students disassembled the set-up and put away equipment. Students did a great job of putting away the ring stands, putting the lab boxes back into their proper places, and washing up after the lab.

The last day to make-up the Waves Test for those who were absent is Thursday of next week otherwise the students will have a zero grade for the test.