Cu dissolved in nitric acid and igniting the residual copper nitrate yielded copper oxide. show chemical equation
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cu + hno3 :- cuno3 + h2
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Copper nitrate is a bright blue crystalline solid containing three molecules of water. When it is heated first it loses the water molecule, on further heating it decomposes to give reddish brown gas, nitrogen dioxide and oxygen. Chemically
Cu(NO3)2.3H2O --heat--> Cu(NO3)2 + 3H2O
2Cu(NO3)2 --heat--> 2CuO + 4NO2 + O2
Cu(NO3)2.3H2O --heat--> Cu(NO3)2 + 3H2O
2Cu(NO3)2 --heat--> 2CuO + 4NO2 + O2
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