|
|Section2= |Section3= |Section4= }} Periodic acid (pronounced per-iodic , rather than as in ''periodic table'') is the highest oxoacid of iodine, in which the iodine exists in oxidation state VII. Like all periodates it can exist in two forms: orthoperiodic acid, with the chemical formula H5IO6 and metaperiodic acid, which has the formula HIO4. Periodic acid was discovered by Heinrich Gustav Magnus and C. F. Ammermüller in 1833. ==Synthesis== Modern industrial scale production involves the electrochemical oxidation of iodic acid, on a PbO2 anode, with the following standard electrode potential: :H5IO6 + H+ + 2 e− → IO3− + 3 H2O 1.6 E° Orthoperiodic acid can be dehydrated to give metaperiodic acid by heating to 100 °C :HIO4 + 2H2O H5IO6 Further heating to around 150 °C gives Iodine pentoxide (I2O5) rather than the expected anhydride ''diiodine heptoxide'' (I2O7). Metaperiodic acid can also be prepared by from various orthoperiodates by treatment with dilute nitric acid. :H5IO6 → HIO4 + 2 H2O 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「periodic acid」の詳細全文を読む スポンサード リンク
|