Friday, Feb 20, 2009 - 4B

Went over Distillation of Wood Lab - Day 1
Sketched diagram of apparatus on board, explained procedures and safety precautions.

Safety: Put 7 popsicle sticks in the burning test tube. You want to fill it but not over-cram it.
2. Attach test tube clamp just at the rubber stopper to prevent melting the rubber stopper. Do not move the alcohol lamp beyond this clamp.
3. The glass L coming from the burning test tube needs to be below the level of ice water in the Erlenmeyer flask so the gas has a chance to condense.
4. Hold the mason jar upright so it doesn't tip over when filling with gas.
5. Make sure you remove the rubber tubing from the water before shutting off the lamp.

Started going over how to do the write-up.

Students practices lighting and extinguishing the alcohol lamps.

Students did a trial set-up of the Day 1 apparatus.