Description

Students become easily
confused between anode
and cathode, oxidation
and reduction, and electron flow during electrolysis.
To help your class keep it all straight, color-code the
reactions! Simply attach electrodes to a 9-volt battery
and place them into a Petri dish containing universal
indicator, then let the electrolysis begin. After writing
out the two half-reactions, one quickly realizes that
the oxidation reaction produces protons and the
reduction reaction produces hydroxide ions. Look
for the change in pH and students will start to solve
the puzzle and clearly understand the concepts. The
Teacher Demonstration comes with enough materials
for demonstration to be repeated 10 times, while the
Laboratory Activity comes with enough materials for
8 different set-ups. Note: 9 V batteries are required,
but not included in either kit.