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- Wed Oct 22, 2008 8:41 pm
- Forum: Chemistry forum
- Topic: defffusing rate
- Replies: 0
- Views: 3615
defffusing rate
Newly minted pennies are made of zinc with a thin copper shell. If the copper coating in nicked, hydrochloric acid can attack the zinc, leaving the copper intact. The hydrochloric acid and the zinc react according to the following equation : 2HCl + Zn ---> ZnCl2 + H2 the hydrogen gas generated from ...