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|Section2= |Section3= |Section6= |Section7= |Section8= }} Sodium selenite is the inorganic compound with the formula Na2SeO3. This salt is a colourless solid. The pentahydrate Na2SeO3(H2O)5 is the most common water-soluble selenium compound. ==Synthesis and fundamental reactions== Sodium selenite usually is prepared by the reaction of selenium dioxide with sodium hydroxide:〔F. Féher, "Sodium Selenite" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 432.〕 :SeO2 + 2 NaOH → Na2SeO3 + H2O The hydrate converts to the anhydrous salt upon heating to 40 °C. Akin to the related salt sodium sulfite, Na2SeO3 features a pyramidal dianion SeO32−. Oxidation of this anion gives sodium selenate, Na2SeO4. 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 selenite」の詳細全文を読む スポンサード リンク
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