This is a multiple concepts lab that has a lot of 'wow' factor for students as metals disappear and new ones appear. It is in miniscale so you that don't use that much of your chemicals. For 250 students, I generally use up: 20 g Fe, three 12"x12" sheets of Al foil, 12" of Mg ribbon, 20g Zn powder, and 200 ml of 1M CuSO4 solution. Equipment: large test tubes, 0.001 accuracy balance, long glass thermometer, small beaker, graduated cylinder, timer (or let them use cell phones)
Concepts covered: Stoichiometry (g-->g), activity series, molar mass, oxidation states, and nomenclature. Also comes with 4 versions of a long a tedious Alternate Assignment - for those students who just will NOT do a pre-lab for homework. The alternate assignment can also be used as a test.
If you use the alternate assignments as classroom practice worksheets - this Lab can fill up to 3 one hour class periods. All answer sheets are included.