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A solution of CuSO4 was kept in an iron ...

 A solution of CuSO4 was kept in an iron pot. After few days the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved. 

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Iron (Fe) is placed above copper (Cu) in the reactivity series. This means that a chemical reaction had occurred between iron (iron pot) and aqueous `CuSO_(4)` solution.
`Fe(s) + CuSO_(4)(aq) rarrFeSO_(4)(aq) + Cu(s)`
Since iron was consumed in the reaction, a number of holes appeared in the pot.
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