Thursday, Feb 28, 2008 - 4B

Students did Distillation of Wood Day 2 in which they distilled the liquid they collected from Day 1.

I had students stop distilling when they still had a thumbs height of liquid in the burning test tube. Students then observed the two liquids, and then mixed them back to see if they got the original back. This could indicate if the distillation was a chemical or physical change.

Went over some of the items on the green lab sheet. Students must follow the order and format of the lab sheet. Grading of the lab is based on the headers of the lab sheet.

By now students should have finished the write-up for Day 1. For homework students should finish the write-up for Day 2. The complete report is due on Friday, March 7. Late work will not be accepted. Starting next class there will be additional homework so students should not wait until the last minute to work on this lab report. It is a long report and I expect an excellent job.

Students are responsible for the lab report even if they missed one or more of the lab days.

Students worked on their reports for the last 20 minutes of the class.