Exhibition Chemistry: Balls of fire

Description

A less common demonstration involving the dehydration of permanganic acid (HMnO4) in air. This is produced by the acid-base reaction of potassium manganate(VII) (KMnO4) with sulfuric acid. The resulting manganese(VII) oxide (Mn2O7) reacts violently with organic compounds and this can be shown through its action on cotton wool.
balls-of-fire

ADDITIONAL INFORMATION