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Old 11 February 2015, 06:46 PM
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Darth Credence Darth Credence is online now
Join Date: 28 October 2005
Location: Salt Lake City, UT
Posts: 3,636

Originally Posted by Dasla View Post
I have heard this as dissolve penny or eat a whole in the carpet.
HCl will not dissolve a penny - it does very little to copper. If you make a nick in the penny so that you get through to the zinc underneath, you can create a hollow penny. It will dissolve the zinc (which is most of the penny) and leave the copper behind. Pretty cool trick, actually.
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