Copper (II) nitrate, likewise known together cupric nitrate, is an inorganic salt known for its an extremely brilliant blue shade that is supplied as catalyst in several reactions.
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Formula and also structure: Copper (II) nitrate chemical formula is Cu(NO3)2. The framework of the anhydrous salt is formed by one cation Cu2+ and also two anions NO3-. The compound reflects up come 5 different hydrate forms, gift the trihydrated Cu(NO3)2.3H2O and the pentahydrated Cu(NO 3)2.5H2O salt the many common. The molar massive of the anhydrous kind is 187.55 g mol-1 if the trihydrate form is 241.60 g mol-1. Its chemistry structure deserve to be composed as below, in the typical representations offered for essential molecules.
Occurrence: Copper (II) nitrate and other copper nitrates are found in natural as part of part minerals as gerhardtite and also rouaite.
Preparation: Copper (II) nitrate is ready from metallic cupper treated v nitric acid. The can also be produced by treating metallic copper through dinitrogen tetroxide:
Cu + 4 HNO3 → Cu(NO3)2 + 2 H2O + 2 NO2
Cu + 2 N2O4 → Cu(NO3)2 + 2 NO
Physical properties: Copper (II) nitrate in every the hydrated creates is a blue, hygroscopic, crystalline solid. The thickness varies according to the hydration, gift 3.05 g mL-1 (anhydrous), 2.32 g mL-1 (trihydrate) or 2.07 g mL-1 (hexahydrate). The melting points room 256 °C for the anhydrous, 114.5 °C (trihydrate) and also 26.5 °C (hexahydrate). Most of lock decomposes at high temperatures. The three creates are highly soluble in water, ammonia and also ethanol. They are insoluble in organic solvents together ethyl acetate.
Chemical properties: Copper (II) nitrate suffer plenty of interesting reaction in chemistry synthesis. Among this reactions is the ready of cupric oxide by pyrolysis over 180 °C:
2 Cu(NO3)2 → 2 CuO + 4 NO2 + O2
Copper (II) nitrate deserve to react with acetic anhydride to induce the nitration of fragrant compounds such together benzene.
Uses: Copper (II) nitrate have the right to be supplied in the manufacturing of pyrotechnics and blue colors and coats. That is likewise used as a classic demonstration the the voltaic cell because of the oxidation reaction between the copper (II) nitrate and one copper electrode. Copper (II) nitrate is likewise uses in the production of copper (II) oxide.
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Health effects / safety and security hazards: Copper (II) nitrate is harmful because that health. The can cause irritation in throat, lungs, skin and also eyes. It is noncombustible, however when mixture with wood, record and various other combustibles, it deserve to burn.