Cobalt(II,III) oxide

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Cobalt(II,III) oxide

Cobalt(II,III) oxide is a chemical compound. It contains some (1 atom) cobalt in the +2 oxidation state and some (2 atoms) in the +3 oxidation state. Its chemical formula is Co3O4. It contains cobalt and oxide ions.

Properties[change | change source]

It is a black solid. It reacts with hydrochloric acid to make chlorine and cobalt(II) chloride.

Preparation[change | change source]

It is made when cobalt(II) oxide is heated to 600 °C (1,112 °F). When it is heated to 900 °C (1,650 °F), it turns back into cobalt(II) oxide.

Uses[change | change source]

It has been used in research for making hydrogen.

Safety[change | change source]

It is irritating to the skin. It can cause harm if swallowed. It dissolves in the stomach acid.

Related pages[change | change source]