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JAMB Chemistry 2005 Question 10

Question 10

Redox Reactions

What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrate (V)?

  1. A.The spoon will be oxidized while the iron (II) ions will be reduced to the metal.
  2. B.The spoon will increase in size.
  3. C.The spoon will be reduced while the iron (II) ions will be oxidized.
  4. D.The spoon will be reduced.
Show the answer and explanation

Answer: A (The spoon will be oxidized while the iron (II) ions will be reduced to the metal.)

Explanation

Aluminium is more reactive than iron, so it displaces iron: Al loses electrons (is oxidised) and Fe2+ gains electrons to form iron metal (is reduced).