ElectrochemistryHard

Question

Aluminium oxide may be electrolysed at 1000oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is
Al3+ + 3e- → Alo
To prepare 5.12 kg of aluminium metal by this method would require

Options

A.5.49 × 107 C of electricity
B.1.83 × 107 C of electricity
C.5.49 × 104 C of electricity
D.5.49 × 101 C of electricity

Solution

Q =
= 5.49 × 107 C

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