Cooling Effect of Boiling

This demonstration uses a vacuum pump to lower the pressure enough on the surface of a liquid to make the liquid boil. A series of questions leads to student understanding of how vapor pressure and boiling are related.

Electrolysis of Copper Chloride Solution

How does a solution conduct? What specifically happens during the electrolysis of copper chloride?

How does the Energy Ball Work

Keep Your Powder Dry

Solid copper(II)chloride is combined with aluminum metal, and the reaction is so slow it appears there is no reaction. A small amount of water is added, and soon a vigorous reaction can be observed.

Polar Molecule Interactions

Redox Demo

Topsy Turvy

Students observe and interpret a demo to develop two concepts. Substances of the same/similar bond type dissolve in one another. Substances of different molecule type do not mix.