Is an optional subject that is given completely in English. The following clip summarizes one of the laboratory practices performed during the semester.
Reversible oxidation of copper.
The objective is to demonstrate the reversibility of the copper oxidation by the action of a reducing agent such as hydrogen.
The copper is heated in air in order to accelerate its oxidation. A change of color, form gold to dark brown is observed as evidence of the copper oxide formation.
After that, a piece of Mg is made react with HCl inside of a syringe to produce hydrogen gas, a strong reducing agent that is forced to flow through copper oxide pieces to react. The hydrogen donates its electrons to copper oxide to produce again, metallic copper.