The oxidation states of vanadium

Description

This demonstration can be used as an introduction to the idea of different oxidation states of transition metal ions often having different colours and that electrode potentials can be used to prdict the course of the redox reactions.

Zinc is used to reduce a yellow solution of ammonium vanadate(V) to a mauve solution containing vanadium(II) ions. The intermediate oxidation states of vanadium(IV) (blue) and vanadium(III) (green) are also seen.

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This demonstration can be used as an introduction to the idea of different oxidation states of transition metal ions often having different colours and that electrode potentials can be used to prdict the course of the redox reactions.

Zinc is used to reduce a yellow solution of ammonium vanadate(V) to a mauve solution containing vanadium(II) ions. The intermediate oxidation states of vanadium(IV) (blue) and vanadium(III) (green) are also seen.

ADDITIONAL INFORMATION

This experiment is part of the Royal Society of Chemistry's publication Classic Chemistry Demonstrations .