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The black powder formed on copper powder in an experiment is likely copper oxide. When copper is exposed to air, it can react with oxygen to form copper oxide, which appears as a black powder. This is a common reaction observed with metals that are prone to oxidation.

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1y ago

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Related Questions

What product is made when you mix copper turnings and sulphur powder?

Copper sulfides, but only after heating the mixture.


When copper is heated in air what colour is the copper oxide formed?

GreenAdded:There are two copper oxides, differing in color:if it is black powder, then it is copper(II) oxide CuO (cupric, more common, as in the mineral 'tenoriet')if it is red powder, then it is copper(I) oxide Cu2O (cuprous oxide, as in mineral the 'cupriet' and it occurs in 'Benedict's test' on reducing sugars)


Is copper oxide a black solid?

Cu2O (Copper(II) Oxide) is a Red Powder. CuO (Copper(I) Oxide) is a Black Powder.


What is the name of the compound formed from the chemical reaction between copper nd oxygen?

"*Cuprous oxide*", or copper (I) oxide, *Cu**2**O*, is a red powder. "**""*Cupric oxide*", or copper (II) oxide, *CuO*, is a black powder.


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

When air is passed over heated copper powder, the copper undergoes oxidation, forming copper oxide. Copper oxide is black in color, which is why the heated copper powder appears black when air is passed over it.


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

Black copper oxide powder is a base because it can react with acids to form salts and water.


What does copper oxide look like after copper has burned?

Copper oxide appears as a black or dark brown powder after copper has burned.


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

The black substance formed on copper is called copper oxide. It is a chemical compound that forms when copper is exposed to oxygen in the air, resulting in a black or greenish-black tarnish on the surface of the copper.


Heating a crystal of blue copper sulfate yields a black powder a hydrate a white powder or sulfur?

Heating a crystal of blue copper sulfate typically results in the release of water vapor, leaving behind white anhydrous copper sulfate powder. The black powder formed may be due to decomposition of the copper sulfate or impurities in the crystal. Sulfur may not be directly produced from heating copper sulfate.


What is observed when air is passed over heated copper powder?

When air is passed over heated copper powder, the copper powder will react with the oxygen in the air, leading to the formation of copper oxide. This reaction can result in a color change in the copper powder from its original metallic color to a reddish-brown color.


Name a compound formed from the chemical reaction between copper and oxygen.?

Cuprous oxide, or copper (I) oxide, Cu2O, is a red powder.Cupric oxide, or copper (II) oxide, CuO, is a black powder.


Is Copper oxide a liquid?

No, it is either a red powder (cuprous oxide) or a black powder (cupric oxide)