Friday, Feb 22, 2008 - 4B

Handed back equipment quizzes and safety quizzes.

Handed out a copy of the safety contract so students can refer to it.
Handed out a description of the lab write-up for the Distillation of Wood Lab.

Went over the handout and what is expected in the lab report.

Listed on white board some things to note while students do the lab.
1. Don't cram so many sticks into your burning test tube that you risk breaking the test tube.
2. If there is a fire alarm, first remove the rubber tubing from the bucket, then shut off the alcohol lamp, and then evacuate the lab.
3. When done burning, call me over and then...
a. Remove the rubber tubing from the bucket
b. Shut off the alcohol lamp
c. Move the rubber band to show the height of gas in the mason jar
d. Lift the mason jar straight up, let the water flow out, then quickly tip the jar so the mouth is up. I will toss in a lit match so we can burn off the gas.
4. Go to the designated coffee can and remove the charred wood splints. Forceps are provided. Put the charred splints in the coffee can. Take one of the wood splints and see if it will burn in the flame of the alcohol lamp. Make observations.
5. Put a solid rubber stopper in the collection test tube. Use masking tape to put your name on the test tube. Store the test tube in the designated test tube rack for Day 2 of the lab.
6. Rinse out burning test tube and rubber stopper/glass L assembly. Do not take apart the rubber stopper/glass L/rubber tubing - leave it all together.
7. Put away all equipment. Put Erlenmeyer flasks and clamp back into the equipment box. Remove any matches from bucket and mason jar and throw them in the trash. Put away buckets, mason jars. Put ring stands back making sure they are put back correctly.
8. Wipe off lab table
9. Wash hands.

Students set up and did Day One of the Distillation of Wood Lab.