Hubbry Logo
search
logo
2037513

Permanganate

logo
Community Hub0 Subscribers
Write something...
Be the first to start a discussion here.
Be the first to start a discussion here.
See all
Permanganate

A permanganate (/pərˈmæŋɡənt, pɜːr-/) is a chemical compound with the manganate(VII) ion, MnO
4
, the conjugate base of permanganic acid. Because the manganese atom has a +7 oxidation state, the permanganate(VII) ion is a strong oxidising agent. The ion is a transition metal ion with a tetrahedral structure. Permanganate solutions are purple in colour and are stable in neutral or slightly alkaline media.

Permanganates can be produced by oxidation of manganese compounds such as manganese chloride or manganese sulfate by strong oxidizing agents, for instance, sodium hypochlorite or lead dioxide:

It may also be produced by the disproportionation of manganates, with manganese dioxide as a side-product:

They are produced commercially by electrolysis or air oxidation of alkaline solutions of manganate salts (MnO2−
4
).

Permanganate compounds are common and strong disinfectants, used regularly to sanitize baths, toilets, and wash basins.[citation needed] It is a cheap and extremely effective compound for the task.

Potassium permanganate is used as a disinfectant and water treatment additive in aquaculture.

Permanganate compounds are useful reagents, but not very selective with organic compounds when used in organic synthesis.

Permanganates are salts of permanganic acid. They have a deep purple colour, due to a charge transfer transition from oxo ligand p orbitals to empty orbitals derived from manganese(VII) d orbitals. Permanganate(VII) is a strong oxidizer, and similar to perchlorate. It is therefore in common use in qualitative analysis that involves redox reactions (permanganometry). According to theory, permanganate is strong enough to oxidize water, but this does not actually happen to any extent. Besides this, it is stable.

See all
User Avatar
No comments yet.