What will be the observation when iron nail is kept in vinegar solution for a week?
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Vinegar contains acetic acid. ... So for the most part the nail will not be affected, but some of the nail's iron will form ferrous acetate.
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The salt/vinegar solution dissolves some of the iron and its oxides on the surface of the nail, leaving a negative charge on the surface of the nail. Opposite charges attract, but the copper ions are more strongly attracted to the nail than the iron ions, so a copper coating forms on the nail.
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