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Q: What black substance form when copper reacts with oxygen?
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What is the substance in the air that causes copper to turn black when in contact with fire?

The substance in the air is oxygen. Copper + oxygen= copper oxide.


What is the name of the black coating that forms on the surface of copper?

copper oxide. when it reacts with the oxygen in the air it produces copper oxide


When a metal powder is heated in open dish it turns black which metal is that?

The metal might be copper. When copper is heated, it reacts with oxygen in air forming copper oxide which is black in colour.


If copper and zinc sulfate are all non black colors why do I get a black substance when copper sulfate reacts with zinc?

The zinc is either contaminated with copper, or the copper is depositing so quickly onto the zinc that it is in a non crystalline structure and therefore appears to be black. Try melting some of the black stuff with a blowtorch and see what happens.


What is the name of the black substance formed on copper?

copper oxide


Does copper react with oxygen gas?

YES copper reacts with oxygen giving various compound of copper like cuprous oxide(red oxide),cupric oxide(black oxide)!! for eg:Cu+O2(temp>1100 degree C)=2Cu2O Cu+O2(TEMP


Why the colour of heated copper powder becomes black when air is passed over it?

the copper reacts with 02 in the air to make copper oxide, which is black 2Cu+O2--> 2Cuo


What type of substance is black copper oxide powder alkali or base?

Black copper oxide is basic innature.


What black solid reacts with oxygen to make carbon dioxide?

Coal


What will happen when copper is heated?

The copper wire glows red. Once it cools...the copper reacts with the air to produce copper(II) oxide. This is shown by the black tarnish on the copper wire.


Why does your copper wiring turn black?

Copper wiring turns black due to oxidation. It is the air reacting with the metal. Copper wiring also sometimes turns green.


Why is it when a piece of copper is folded squashed and heated in air only the outside of the copper is black?

The black coating you see is a coating of copper oxide, which forms when the hot metal reacts with air. no air can reach the inside, so it does not react to form black copper oxide.