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Question:

Why does Copper lose its colour when it's heated?

Just wondering why :)

Answer:

Leonard Dale and Nick Roberts posted the same question. You should see their answers side by side.
I'm not completely convinced about this one
Heating Copper
The colour changes when you heat copper in air or oxygen and it turns pinkist red, grey then finally appears black. This is a coating of copper(II) oxide that has been formed by reaction with the oxygen in the air. It will often fall away leaving unreacted copper exposed underneath. Chemical equation: 2Cu + O2 ----> 2CuO Copper sulfate is normally found in the form of blue crystals, copper (II) sulfate pentahydrate. ( 5 H2o)When you heat copper sulfate pentahydrate it turns white as the water which is driven off by the heat. The white solid remaining is anhydrous copper sulfate. If you add water to the anhydrous copper sulfate an exothermic reaction occurs, you can feel the test-tube getting hot, as the blue copper sulfate pentahydrate is re-formed.

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