Formula of green coating
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The green coating formed on the copper when it is exposed to air is a mixture of copper carbonate - CuCO3 and copper hydroxide - Cu(OH)2.Oct 26, 2013
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Answer: The green coating formed on the copper when it is exposed to air is a mixture of copper carbonate - CuCO3 and copper hydroxide - Cu(OH)2.
⏭️Copper in moist air slowly acquires a dull green coating because its top layer has oxidised with the air. Some architects use this material on rooftops for this interesting colour. The green material is a 1:1 mole mixture of Cu(OH)2 (the hydroxide) and CuCO3 (the carbonate)
2 Cu (s) + H2O (g) + CO2 + O2 → Cu(OH)2 + CuCO3 (s)
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