post-1982
2006-11-22 10:07:31 · 6 answers · asked by anonymous 4 in Science & Mathematics ➔ Chemistry
An acid dip will do it. The problem being that the acid will eat the zinc too. SO, use a dilute acid, such as muriatic. Which is dilute hydrochloric acid. Nitric, and phosphoric acid would also work. Make sure you don't use a concentrated acid, as it is not needed, and can be quite dangerous. There is a good chance that a commercial AC coil cleaning solution (inhibited dilute phosphoric I believe) would do the job. Once the copper is removed, make sure to use tongs to remove the penny, and then rinse it well to stop the action of the acid.
2006-11-22 10:24:02 · answer #1 · answered by Andrew S 1 · 0⤊ 0⤋
It is a mixture of copper and zinc.
97.6% zinc core, 2.4% copper plating after 1982.
1984.32 °F is the melting point of copper. 787.15 °F is the melting point of zinc. Melt the zinc out and leave the copper solid.
2006-11-22 10:15:34 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Can't do it because the penny is solid except for those steel ones they minted during WWII
2006-11-22 10:14:56 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Eat it...Or get that stuff that if u dip it in wal la the penny is shiney again. TARNEX
2006-11-22 10:15:29 · answer #4 · answered by sweet_thing_kay04 6 · 0⤊ 0⤋
with a file....i actually did it once when i was a kid.
2006-11-22 10:09:25 · answer #5 · answered by miss_chrissy_dawn 4 · 0⤊ 0⤋
melt it down...
2006-11-22 10:09:04 · answer #6 · answered by cork 7 · 0⤊ 0⤋