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Aluminium oxide may be electrolysed at 1000^ C to furnish aluminium metal (Atomic mass =27 amu; 1 Faraday =96,500 Coulombs). The cathode reaction is Al ³⁺+3 e ⁻ Al ^ To prepare 5.12 ~kg of aluminium metal by this method would require

Options

  1. A5.49 10^7 C of electricity
  2. B1.83 10^7 C of electricity
  3. C5.49 10^4 C of electricity
  4. D5.49 10^1 C of electricity

Correct answer

A. 5.49 10^7 C of electricity

Step-by-step solution

aligned & Q = mFZ M = 5.12 10^5 96500 3 27 & =5.49 10^7 C aligned

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