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An iron nail placed in a solution copper (ll) tetraoxosulphate (VI) is soon covered with...

Chemistry
WAEC 2000

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 ?

  • A. Fe 2+ (aq) + Cu(s) → Fe 3+ + Cu 2+ (aq)
  • B. Fe 2+ (aq) + Cu(s) → Fe(s) + Cu2+ (aq)
  • C. Fe (s) + Cu2+ (aq) → Fe2+(aq) + Cu2+ (aq)
  • D. Fe(s) + Cu2+ → Fe2+(aq) + Cu(s)
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Correct Answer: Option 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.

 

 

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