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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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ritznca ritznca
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11 years ago
A popular classroom demonstration consists of filing notches into a new penny and soaking the penny in hydrochloric acid overnight. Since new pennies are made of zinc coated with copper, and since hydrochloric acid dissolves zinc and not copper, the inside of the penny is dissolved by the acid, while the outer copper shell remains. Suppose the penny contains 1.5  of zinc and is soaked in 40.0 ml of 6.0 M HCl .
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toni_malvinatoni_malvina
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11 years ago
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