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You can also turn pennies and some other coins green by letting them sit overnight in a paper towel soaked in vinegar. and if you want to clan pennies to shine, put them in a cup of vinegar and salt dissolved.

(I once tried cleaning them with a pinch of kosher salt instead and it dug a hole through the penny! -NOT RECOMENDED!!!)

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A Chipmunk

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3y ago
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Wiki User

15y ago

Pennies do turn green from oxygen gas eventually i kno i have a green penny

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15y ago

Pennies are not made of pure copper, they are an alloy of copper and other metals to prevent them from tarnishing green.

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13y ago

yes

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Q: Is a copper penny turning green a chemical change?
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Continue Learning about Earth Science

By heating green copper carbonate so that it changes to black copper oxide will this be a chamical or physical change?

Chemical, the resultant molecules have different structures and properties.


Is copper turning green in the air physical change?

The reason that copper turns green is the same reason the metal rusts, oxidization. Both metal and copper oxidize when exposed to oxygen and this is a natural process. Copper that is exposed to the outside environment is more likely to turn green and that is why copper vases and decorative pieces in gardens are often green. Copper is a metal that does not react with water (H2O), but the oxygen of the air will react slowly at room temperature to form a layer of brown-black copper oxide on copper metal which looks like green sometimes...


What is the word for copper turning green?

The word is "oxidation", which in the case of copper is a three-step process where the copper oxidizes to copper oxide, then to cuprous or cupric sulfide, and then to copper carbonate. Copper carbonate is the green colored copper or patina that forms over time. The old name for this green patina is "verdigris".


What happens when you put copper in salt water?

When copper is placed in salt water, a chemical reaction causes the copper to turn a blue-green color: this is called copper chloride. If you leave copper in salt water long enough beside the change of color, you should also see a blue-green film or powder appear. This is normal.


Why does a copper vessel turn green in color in the rainy season?

An unprotected copper vessel will turn green eventually due to several chemical reactions, regardless of the environment. The wetness of the rainy season simply speeds up the chemical process. The process by which copper turns green in color is due to the slow oxidation of the copper metal into its oxides. Initially copper oxide forms (reddish), replaced by cuprous and cupric sulfide (color varies), and finally by copper carbonate (greenish). The final copper carbonate is highly resistant to corrosion and hence the vessel will remain green.

Related questions

Is turning of copper into green when exposed into environment physical or chemical change?

It is a chemical change.


Is copper turning green when expose to environment a chemical change and why?

It is a chemical change because chemical reactions are involved; copper become hydrated copper carbonate.


Is the Statue of Liberty a physical change or a chemical change?

No its a chemical change because the acid in the rain reacts with the copper in the statue having a reaction oxidizing it and turning it green.


Is copper metal turning green on exposure to air and water a physical or chemical change?

Yes it is a chemical change Because colour is changing and a new substance is forming and it's irreversible.


Is copper turning green when exposed to the environment a chemical change?

Chemical because it is being exposed to another compound and forming a new substance


When Iron is turning into rust and copper turning green is an example of what kind of erosion?

"chemical"


Is something turning copper to green a chemical reaction?

ya mon.


When copper turns green when exposed to the environment a physical or chemical change?

First, copper doesn't "turn green," it reacts with oxygen in the air to form copper oxide. This is a chemical change, because copper oxide is a substance that was not there before.


When A bronze statue develops a green coating (patina) over time is physical change or chemical?

It is chemical. The copper in bronze turns green when it oxidizes.


Does copper turn green by a chemical or physical change?

Chemical. It turns green because of oxidation.


Is copper turing green a physical or chemical change?

It's a chemical change. Copper oxidizes to form copper oxide, which is similar to iron rusting. A color change very often indicates a chemical change.


Copper turns green when exposed to the environment chemical or physical?

it is a chemical change because copper is one of the elements on the periodical table .