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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Potassium ferrioxalate ： ウィキペディア英語版 Potassium ferrioxalate |Section2= |Section3= |Section7= |Section8= }} Potassium ferrioxalate, also known as potassium trisoxalatoferrate(III), is a chemical compound with the formula K3(), where iron is in the +3 oxidation state. It is an octahedral transition metal complex in which three bidentate oxalate ions are bound to an iron center. Potassium acts as a counterion, balancing the -3 charge of the complex. Crystals of the trihydrated form of the complex, K3()·3H2O, are emerald green in color. In solution, the salt ionizes to give the ferrioxalate anion, ()3−, which appears fluorescent green in color. Potassium ferrioxalate is often used in chemical actinometry, i.e. the measure of light flux. ==Preparation== The complex can be synthesized by the reaction between iron(III) sulfate, barium oxalate and potassium oxalate:〔John C. Bailar, Eldon M. Jones "Trioxalato Salts (Trioxalatoaluminiate, -ferriate, -chromiate, and -cobaltiate)" Inorganic Syntheses, 1939, vol. 1, Pages: 35–38. 〕 :Fe2(SO4)3 + 3 BaC2O4 + 3 K2C2O4 → 2 K3() + 3 BaSO4 The reactants are combined in water, the solid precipitate of BaSO4 is removed, and the green trihydrate crystallizes from the cooled solution. Another common synthesis is reacting aqueous iron(III) chloride hexahydrate and potassium oxalate monohydrate. Filter the solid using filter paper and a Büchner funnel and recrystallize the product to remove impurities.〔Prefomed by Benjamin J. Abram, OSU lab manual, Dr. Richard Nafshun〕 :FeCl3•6H2O + 3 K2C2O4•H2O → K3()•3H2O + 3 KCl + 6 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「Potassium ferrioxalate」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.