If copper is exposed to wet air for an extended period, it develops a greenish coating. Why?

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Solution

If copper is exposed to wet air for an extended period, copper reacts with water, carbon dioxide, and oxygen in the environment to generate copper hydroxide and copper carbonate. This results in a green deposit.

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Similar questions

Q. If copper is exposed to wet air for an extended period, it develops a greenish coating. Why?

A copper article if exposed to air, develops a green coloured layer of:

When copper vessels are exposed to moist air for a long time, a green coating is formed. Which are the constituents of the coating?
(i) Copper hydroxide
(ii) Copper carbonate
(iii) Copper oxide

Q. An object was originally a copper colour. After being exposed to the air, it turned a greenish colour. What kind of change happened? Explain your answer.

When a copper object is exposed to moist air for a long time,then a green coating is formed on its surface.

(a) What is the material of the green coating ?

(b) State whether the green coating is acidic or basic.

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