Potassium perbromate

Potassium pentafluoroaluminate monohydrate, 2 371 Potassium perbromate, 4 335 Potassium perchlorate, 18 277 Potassium permanganate, 9 635-636 crystallographic studies on, 15 601 as a detoxicant, 15 621 decomposition of, 15 597 as an ignitable waste, 15 615 industrial-scale production of, 15 606 manufacture of, 15 601-606 for purifying carbon dioxide streams, 4 815... 

The crystal structure of potassium perbromate has been determined, and it was found that the perbromate ion is tetrahedral as expected from the isoelectronic ClO, JO, and Xe04 species. 

The new compound perbromyl fluoride, Br03 F, was recently successfully synthesized in high yield by an adaptation of this procedure with potassium perbromate used in place of the perchlorate.6... 

If potassium perbromate is the desired product, neutralize the solution potentiometrically with 4 M potassium hydroxide, using 0.1 M potassium hydroxide to reach the precise end point. It is advisable to keep a little of the perbromic acid solution in reserve in case the end point is overshot. Glassware may be used for this and subsequent steps. 

Heat the potassium perbromate slurry to 100° and add enough water to bring all the solid into solution at this temperature. Allow to cool gradually to room temperature. Then chill in an ice bath for an hour and decant the supernatant solution. Redissolve the solid in a minimum of water at 100° and again cool, chill, and decant. Dry the solid at 100°. Transfer to an agate mortar, crush, and dry to constant weight at 110° in vacuum. The yield of potassium perbromate is 80% of the perbromic acid taken. If the recrystallization step is omitted, the yield is 90%. 

Pure potassium perbromate is stable up to 275°, at which temperature it decomposes to potassium bromate. The impure product may undergo partial decomposition at lower temperatures. 

Potassium perbromate, KBr04.—The perbromate has been prepared... 

Silver perbromate, AgBr04.—The perbromate is prepared by double decomposition from potassium perbromate and silver nitrate, and is but slightly soluble in cold water. 

Salts such as KB1O4 (dec. 275 °C) and NH4Br04 (dec. 170°C) are fairly stable thermally and isomorphoms with their perchlorate analogues. However, potassium perbromate is thermodynamically less stable than both the corresponding perchlorate and periodate analogues. 

Potassium perbromate has been structurally characterized and contains tetrahedral [Br04] ions (Br—O = 161 pm). Thermochemical data show that [Br04] (half-reaction 17.81) is a slightly stronger oxidizing agent than [C104] or [104] under the same conditions. However, oxidations... 

Potassium perbromate KBr04 and perbromic acid HBr04 are known. Although the redox couple... 

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