Thursday, April 10, 2008 - 4A

Quiz on fractional distillation.

Students corrected other students papers with red pen, handed them back to owners, and then handed them in bin.

Next identification labs will be Crystal Test, Acid Test, Flame Test
Went over how to set up crystal test in petri dish.
Using an overhead marker, draw lines on the bottom of the petri dish to divide the dish into quadrants. Label the quadrants 1 for CuSO4, 2 for NaCl, 3 for CaCO3/MgCO3, 4 for KCl. Students either used the solutions I mixed up (shaking first) and put 4-5 drops of each solution in the correct quadrant, or put a few drops of water in the quadrant, added some powder, and then mixed to dissolve.

Students put petri dishes in box lid to evaporate to form crystals for next class.

Students put neat data table (drawn with ruler) in notebooks for next time.

Collected notebooks.

I planned to show the Bill Nye video on Chemical Reactions but some students wanted to run some activities. I decided to let them try. It was not very successful.