why copper vessel left shiny surface when they put in air
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One of the main reason why the copper vessels lose their shine when exposed to air is due to the passivization. ... At the surface of vessel, Copper atoms react with the Oxygen atoms in the air forming copper-oxide.
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Answer:
A copper vessel reacts with oxygen present in air when exposed to it , they forms copper oxide which , in turn , is a black coating over the vessel and makes the vessel to lose its shine
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