Copper does not burn but hot metal is coated

Asked by admin @ 23/08/2021 in Chemistry viewed by 324 People

Copper does not burn but the hot metal is coated with a black coloured layer of copper 2 oxide why

Answered by admin @ 23/08/2021

Hey dear,

● Explanation -
Copper metal when exposed to hearing in air, oxygen reacts with copper surface forming thin layer of copper oxide over it.
2Cu + O2 --> 2CuO

This cupric oxide is already burnt and can't go reaction further. This layer being coated on pure copper, protects it from oxygen.

Therefore, whole copper doesn't burn, instead black coat of copper oxide is formed over it.

Hope this helps you...

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