Perxenates decomposition

In acid solution 03 is exceeded in oxidizing power only by fluorine, the perxenate ion, atomic oxygen, OH radicals, and a few other such species. The rate of decomposition of ozone drops sharply in alkaline solutions, the half-life being 2 min in 1 M NaOH at 25°C, 40 min at 5 M, and 83 h at 20 M ... 

The perxenates are colorless, thermally stable solids. Anhydrous sodium perxenate can be obtained at 373 K. It decomposes at 633 K. The corresponding barium salt decomposes at about 570 K. Perxenate solutions are powerful and rapid oxidizing agents. Xenon(VIII) is reduced to xenon(VI). Oxidation processes in acid media are more effective, but they must be fast enough to compete with decomposition of the perxenate, which is also rapid in acid. 

The acid potential is exceeded only by fluorine (p. 804), perxenate (p. 901), atomic O, the OH radical, and a few other such potent oxidants. Decomposition is rapid in acid solutions but the allotrope is much more stable in alkaline solution. At 25° the half-life of O3 in 1 M NaOH is 2min corresponding times for 5 m and 20 m NaOH are 40 min and 83 h respectively. 

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See also in sourсe #XX -- [ , , , ]

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