Sulfuric acid can act in three main ways: as an acid, an oxidising agent and a dehydrating agent. Demonstrations of the dehydrating properties of sulfuric acid are commonly given to audiences of 16--18 year olds (and to younger audiences for their visual appeal). A less common demonstration involves the dehydration of permanganic acid. This is produced in the acid-base reaction of potassium manganate(VII) with sulfuric acid. The resulting manganese(VII) oxide reacts violently with organic compounds and this can be shown through its action on cotton wool. Find out how to perform this demonstration at http://rsc.li/EiC114ec This is part of the Education in Chemistry Exhibition Chemistry series: chemistry demonstrations to capture your students' imaginations: http://rsc.li/EiCExChem
Balls of fire! Dehydration of permanganic acid - YouTube |
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