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|Section2= |Section3= |Section7= |Section8= }} Copper(II) nitrate, Cu(NO3)2, is an inorganic compound that forms a blue crystalline solid. Anhydrous copper nitrate forms deep blue-green crystals and sublimes in a vacuum at 150-200 °C. Copper nitrate also occurs as five different hydrates, the most common ones being the trihydrate and hexahydrate. These materials are more commonly encountered in commerce than in the laboratory. ==Synthesis and reactions== Hydrated copper nitrate can be prepared by hydration of the anhydrous material or by treating copper metal with an aqueous solution of silver nitrate or concentrated nitric acid:〔 :Cu + 4 HNO3 → Cu(NO3)2 + 2 H2O + 2 NO2 Anhydrous Cu(NO3)2 forms when copper metal is treated with N2O4: :Cu + 2 N2O4 → Cu(NO3)2 + 2 NO Attempted dehydration of any of the hydrated copper(II) nitrates by heating instead affords the oxides, not Cu(NO3)2. At 80 °C, the hydrates convert to "basic copper nitrate" (Cu2(NO3)(OH)3), which converts to CuO at 180 °C.〔 Exploiting this reactivity, copper nitrate can be used to generate nitric acid by heating it until decomposition and passing the fumes directly into water. This method is similar to the last step in the Ostwald process. The equations are as follows: :2 Cu(NO3)2 → 2 CuO + 4 NO2 + O2 :3NO2 + H2O → 2HNO3 + NO 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「Copper(II) nitrate」の詳細全文を読む スポンサード リンク
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