Carry out the chain of transformations Cu -Cu (NO3) 2-NO2 -HNO3-NaNO3-O2-CuO.
| May 7, 2021 | education
1. Dissolution of copper in nitric acid – formation of nitrate.
Cu + 4HNO3 = Cu (NO3) 2 + 2NO2 + 2H2O.
2. Decomposition of copper nitrate when heated.
2Cu (NO3) 2 = 2CuO + 4NO2 + O2.
3. Reaction of nitrogen dioxide with water.
3NO2 + H2O = 2HNO3 + NO.
4. Reaction of nitric acid with alkali to form nitrate.
HNO3 + NaOH = NaNO3 + H2O.
5. Decomposition at temperatures above 400 ° C.
NaNO3 = O2 + 2NaNO2.
6. Combustion of copper in excess of oxygen at a temperature of 400-500 ° C.
O2 + 2Cu = 2CuO.
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