An iron nail placed in a solution copper (ll) tetraoxosulphate (VI) is soon covered with a deposit of copper. Which of the following equations represents the reactions ?
- Fe 2+ (aq) + Cu(s) → Fe 3+ + Cu 2+ (aq)
- Fe 2+ (aq) + Cu(s) → Fe(s) + Cu2+ (aq)
- Fe (s) + Cu2+ (aq) → Fe2+(aq) + Cu2+ (aq)
-
Fe(s) + Cu2+ → Fe2+(aq) + Cu(s)
The correct answer is: D
Explanation
When an iron nail is placed in a solution of copper (ll) tetraoxosulphate (VI), the nail is covered with a brown deposit of copper, which means it's solid, and green FeSO4 (Fe2+) is also produced. Perusing the equations in the given options, it's only in option D we have Cu solid as one of it's product. Option D is the correct answer.