Question

why do copper vessel lose shine when exposed to air​

Answer 1

hey here is your answer :-

Copper vessel lose shine when exposed to air because

At the surface of the vessel ,copper atom reacts with oxygen atom forming the copper oxide due to oxidation reaction .

At the surface of the vessel ,copper atom reacts with oxygen atom forming the copper oxide due to oxidation reaction .2Cu + O2 -----> 2CuO

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Answer 2

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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 .

2Cu + O2 = 2CuO

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