...The simplest composition is orthomolybdate M I 2 MoO 4. Molybdic acid has a strong tendency to condense. For example, an aqueous solution of potassium salt K 2 MoO 4 is alkaline, but when acid is added to it, condensation proceeds depending on the hydrogen ion concentration, producing isopolymolybdate ions such as Mo 2 O 7 2- , Mo 7 O 24 6- , HMoO 24 5- , Mo 8 O 26 4- , and H 2 Mo 8 O 26 2- . It is thought that an equilibrium exists between these, but various salts are extracted at appropriate concentrations. ... *Some of the terminology that refers to "isopolymolybdate ion" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…最も簡単な組成のものはオルトモリブデン酸塩MI2MoO4である。モリブデン酸は縮合する傾向が強く,たとえばカリウム塩K2MoO4の水溶液はアルカリ性を呈するが,これに酸を加えていくと水素イオン濃度により縮合が進み,Mo2O72-やMo7O246-,HMoO245-,Mo8O264-,H2Mo8O262-などのイソポリモリブデン酸イオンを生成する。これらの間には平衡が成立していると考えられるが,適当な濃度のところで各種の塩が取り出されている。… ※「イソポリモリブデン酸イオン」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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