Cu(OH)2-->CuO+H2O

This is a double replacment reaction. This reaction occurs when cations and anions from two different componds mix to form two new compounds. This happens when the new product formed cannot be split into cations and anions, therefore a precipitate forms.

Before

During

After

In this reaction we poured the Cu(OH)2 into a vacummed filter so that the liquid (H20) seperated from the solid (CuO). The copper ended as a black solid in the filter paper.