What happens when a copper vessel is exposed to moist air for long time? Write chemical reaction also?
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it gets corroded due to Oxygen and becomes green in colour
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Copper metal when exposed to air turns green in colour due to corrosion. When copper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide. This gives a green colour to the surface of copper metal.
2Cu + H2O + CO2 + O2 = CuCO3 + Cu(OH)2
This corrosion can be prevented by applying a layer of grease or paint cover that will prevent the copper surface from coming in contact with the air.
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