permanganic acid

noun

Chemistry.

1. an acid, HMnO 4 , known only in solution.

permanganic acid

/ ˌpɜːmænˈɡænɪk /

noun

1. Systematic name: manganic(VII) acid. a monobasic acid known only in solution and in the form of permanganate salts. Formula: HMnO 4

permanganic acid

1. An unstable inorganic acid existing only in dilute solution. Its purple aqueous solution is used as an oxidizing agent. Chemical formula: HMnO ₄ .

Word History and Origins

Origin of permanganic acid¹

First recorded in 1830–40

Example Sentences

If this second bath of binoxide of barium does not produce the requisite whiteness, it is introduced into a solution of permanganic acid or permanganate of magnesia before the last washing.

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Manganese forms two unstable acids, namely, manganic acid and permanganic acid.

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Organic acids, ferrous oxide, chromic oxide, ammonium salts, etc., prevent the formation of peroxide and the red color produced by permanganic acid.

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It is obtained by treating a solution of permanganate of baryta with sulphuric acid, when sulphate of baryta falls, and the permanganic acid remains dissolved in the water.

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In both cases the characteristic coloration from permanganic acid is developed by the action of the current at the positive pole; this, however, disappears in the direction of the negative electrode.

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