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Salt or NaCl dissociates in water to form Na+ and Cl- ions. Copper will react with two equivalents of Cl- to form CuCl2, which is the greenish "rust" you might observe. It will slightly dissolve the copper to do this. Steel is a mixture of iron and coal. The iron will react with three equivalents of Cl- forming FeCl3. However, at normal temperature and pressure tese reactions are unlikely to occur due to their stabilities in given form.

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13y ago

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