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What happens when copper utensils are exposed to prolonged atmospheric air?
Wiki User
∙ 7y ago
When copper is exposed to moist air for a long time, it acquires a dull green coating. The green material is a mixture of copper hydroxide and copper carbonate. This film called 'verdigris' protects the underlying metal from further damage.
2Cu + H2O+CO2 + O2 Cu(OH)2 + CuCO3
Wiki User
∙ 7y ago
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