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A copper penny builds up a layer of corrosion on its outsides. Probably copper oxide. The cleaning just dissolves the outer corrosion and leaves a new outer layer of copper. CuO + HNO3 --> Cu(NO3)2 + H2O ... the copper nitrate is dissolved in the acid solution and leaves 'clean' copper behind.
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∙ 11y ago
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Is cleaning a penny with vinegar and salt a physical or chemical change?
It is a chemical reaction and this is the correct way to spell penny!
Is cleaning a chemical reaction?
Cleaning involve chemical reactions but cleaning is possible also by dissolution of contaminants - a physical process.
Is cleaning a sink with Drano a chemical reaction?
yes it is
Is cleaning a penny a chemical change or a physical change?
this is my homework just give the answer already!
How is putting ketchup on a penny a chemical reaction?
it's not. tell whoever told you that to go back to pre-school.
Is cleaning a penny with vinegar and salt a physical or chemical change?
It is a chemical reaction and this is the correct way to spell penny!
Is a rusty penny an example of a chemical reaction true or false?
Yes. The rust on the penny indicates that a reaction between the penny and its environment has occurred. Since a new material was formed from this reaction (the rust) the reaction must be a chemical reaction.
Is dissolution of a copper penny in nitric acid a chemical reaction?
Yes. Dissolution of a copper penny would indeed be a chemical reaction.
Is cleaning a chemical reaction?
Cleaning involve chemical reactions but cleaning is possible also by dissolution of contaminants - a physical process.
Is cleaning a sink with Drano a chemical reaction?
yes it is
Is cleaning a penny a chemical change or a physical change?
this is my homework just give the answer already!
Is turning a penny gold a chemical or physical reaction?
Anything else then dropping it in molten gold is chemical
Is putting a penny in lemon juice a physical or chemical change?
physical reaction
What chemical process involve in cleaning?
Cleaning is a reaction between soaps (and other detergents) with dirt, followed by dissolution and releasing of the formed compounds.
What chemical reaction is formed from toothpaste?
None. Toothpaste is a cleaning substance containing soap, that is why it foams.
How long does it take for bleach to clean a penny?
Not sure, but if the penny/cent has any numismatic value, cleaning with bleach or any other chemical will reduce its value significantly
How is putting ketchup on a penny a chemical reaction?
it's not. tell whoever told you that to go back to pre-school.
