Copper(II) Oxide

Copper(II) Oxide is an inorganic chemical with the formula CuO. It is used as a precursor to other copper compounds, and is a product in the process to refine copper.

Like basic copper(II) carbonate it reacts with acids to create the respective copper salt although it's reactions are more tame as there is no bubbling due to the formation of carbon dioxide. Copper is only able to react with oxidizing acids, so if the copper is already in its oxide form it can react with most non oxidizing acids.

Heating of copper(II) hydroxide, basic copper(II) carbonate, or copper(II) nitrate yields copper(II) oxide.

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