Aqueous copper(II) sulfate solution is placed in an iron container and left to stand for several days. Which statement describes what happens? A) Atmospheric oxygen reacts with the copper(II) sulfate to give black copper(II) oxide. B) Some fine iron particles are formed in the solution. C )The part of the container in contact with the solution is coated with copper. D) The solution turns from green to blue.

C )The part of the container in contact with the solution is coated with copper.

Explanation:

To understand the answer to the question, we must have a good knowledge of the electrochemical series.

Remember that iron is above copper in the electrochemical series. This means that iron can replace copper in an aqueous solution of a copper salt.

The following reaction occurs in the container;

Fe(s) + CuSO4(aq) > FeSO4(aq) + Cu(s)

This is why the part of the solution in contact with the container becomes coated with copper.

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