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COPPER PENNY REACTS WITH NITRIC ACID (2 of 3)
Resulting NO Gas Oxidizes Forming NO2 Gas
Oxidation of copper metal by nitric acid produces nitric oxide (NO) gas which is immediately oxidized in air to form brown nitrogen dioxide (NO2) gas. The copper atoms lose two electrons to form Cu2+ ions which give a blue color in water.
Copyright:© 1988 Richard Megna - Fundamental Photographs
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