Thursday, April 3, 2008 - 4B

Students took chapter 2 test.

Introduced Fractional Distillation Lab.
Day 1: take temperature vs time data, plot data to get heating curve, find boiling points.
If you get green liquid in second test tube, it shows you over boiled.
Day 2: Swap out test tubes 2 degrees after first boiling point and 2 degrees before second boiling point. It takes 3 test tubes to make sure you get pure substances.
If you were to have 3 liquids, it would take 5 test tubes.

Drew diagram of lab setup.

Explained flammability test after Day 2.
We will do crystal test after Day 1 with what is left in the boiling test tube.