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14 March, 18:35

When an iron nail is added to a copper sulfate solution, the blue color begins to disappear from the solution and brown flakes appear on the nail. The incomplete equation for the reaction is Fe + CuSO4 → FeSO4 + X. What is X in the equation? A) Cu B) CuO C) CO4 D) CuO2

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  1. 14 March, 22:10
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    A) Cu

    Explanation:

    In aqueous solution, CuSO₄ has a blue color. When the reaction with Fe occurs, it is produced FeSO₄. The brown colour is explained by the formation of copper (Cu) in the surface of Iron, that means the reaction is:

    Fe + CuSO₄ → FeSO₄ + Cu

    Thus, X is A) Cu
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