How many Coulombs of electric charge are required for the complete reduction of of ions to metallic aluminium?

Answer and explanation

Correct answer: C.

  1. Step 1: The electrode reduction reaction is: .
  2. Step 2: Reduction of of requires of electrons: .
  3. Step 3: .
Answer
.
Why not the others: corresponds to (monovalent reduction); corresponds to divalent ions; and corresponds to tetravalent ions.

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