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Potassium periodate : ウィキペディア英語版 | Potassium periodate
|Section2= |Section3= |Section7= |Section8= }} Potassium periodate is an inorganic salt with the molecular formula KIO4. It is composed of a potassium cation and a periodate anion and may also be regarded as the potassium salt of periodic acid. Note that the pronunciation is per-iodate, not period-ate. Unlike other common periodates, such as sodium periodate and periodic acid, it is only available in the ''meta''periodate form; the corresponding potassium ''ortho''periodate (K5IO6) has never been reported. ==Preparation== Potassium periodate can be prepared by the oxidation of an aqueous solution of potassium iodate by chlorine and potassium hydroxide. :KIO3 + Cl2 + 2 KOH → KIO4 + 2 KCl + H2O It can also be generated by the electrochemical oxidation of potassium iodate, however the low solubility of KIO3 makes this approach of limited use.
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