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|Section2= |Section6= |Section7= |Section8= }} Sodium selenate is the inorganic compound with the formula , not to be confused with sodium selenite. It exists as the anhydrous salt, the heptahydrate, and the decahydrate.〔Kamburov, S.; Schmidt, H.; Voigt, W.; Balarew, C. "Similarities and peculiarities between the crystal structures of the hydrates of sodium sulfate and selenate" Acta Crystallographica B (Struct Sci Cryst Eng Mater.) 2014, volume 70, pp. 714-22. 〕 These are white, water-soluble solids. The decahydrate is a common ingredient in multivitamins and livestock feed as a source of selenium. The anhydrous salt is used in the production of some glass. Although the selenates are much more toxic, many physical properties of sodium selenate and sodium sulfate are similar.〔Bernd E. Langner "Selenium and Selenium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim. .〕 ==Production== Sodium selenate is produced by oxidation of selenium, first with nitric acid, producing selenous acid. The selenous acid is neutralized to form sodium selenite. The sodium selenite is oxidized in a basic medium hydrogen peroxide to form a selenate, which is then spray-dried.〔Bjornberg, A.; Martensson, U.S.; Paulsson K.M. (Boliden Aktiebolag). Method for producing selenium salts. US Patent 4,605,544, August 12, 1986.〕 :Se + 2HNO3 → H2SeO3 + NO + NO2 :H2SeO3 + Na2CO3 → Na2SeO3 + H2O + CO2 :Na2SeO3 + H2O2 → Na2SeO4 + H2O. It was prepared shortly after the discovery of Selenium by Jöns Jacob Berzelius in 1817. 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「sodium selenate」の詳細全文を読む スポンサード リンク
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