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

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