Knowra Copper(II) nitrate Copper(II) nitrate Copper(II) nitrate is an inorganic salt composed of Cu²⁺ ions and nitrate ions, with formula Cu(NO₃)₂. It commonly occurs as blue hydrated crystals and forms brown nitrogen dioxide when heated.
Copper(II) ion : The Cu²⁺ cation, formed when a copper atom loses two electrons. Each formula unit contains one copper ion in the +2 oxidation state.
Thermal decomposition : The breakdown of a chemical compound into simpler substances through heating. Heating copper(II) nitrate produces copper(II) oxide, nitrogen dioxide, and oxygen.
Copper electroplating : The deposition of metallic copper onto a surface by electrolysis. Copper(II) nitrate can supply dissolved copper ions in experimental plating baths.
Copper(I) nitrate : A nitrate salt containing copper in the +1 oxidation state, with formula CuNO₃. It differs in copper oxidation state and stoichiometry, and is far less stable.
Nitrate : The polyatomic anion NO₃⁻, containing one nitrogen atom bonded to three oxygen atoms. Two singly charged nitrate ions balance the charge of each Cu²⁺ ion.
Nitrogen dioxide : A reddish-brown toxic gas with formula NO₂, formed in several high-temperature nitrogen-oxide reactions. It gives the brown fumes observed when copper(II) nitrate decomposes.
Chemical reagent : A substance used to cause, detect, or study a chemical reaction. The salt supplies Cu²⁺ and nitrate ions in laboratory reactions and demonstrations.
Copper(II) sulfate : A copper(II) salt with sulfate anions, commonly encountered as blue hydrated crystals. Its similar color can obscure that sulfate replaces nitrate and changes the chemistry.
Ionic compound : A substance composed of oppositely charged ions held together by electrostatic attraction. Copper(II) nitrate’s formula expresses the ratio of its cations to anions.
Copper(II) oxide : A black inorganic compound of copper and oxygen with formula CuO. It remains as a solid product after the nitrate’s thermal decomposition.
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