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CGP EDU Academic Team
Published on: August 14, 2026
Aluminium oxide may be electrolysed at 1000ºC to furnish aluminium metal (At.Mass of Al = 27 amu ; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al 3+ + 3e – → Al 0 . To prepare 5.12 kg of aluminium metal by this method, one would require:
Text Solution
Verified by ExpertsThe correct answer is:
A
Al 3+ + 3e – 
Al.
=189.62 mol.
Charge = 189.62 × 3 × 96500 = 5.489 × 10 7 coulomb.
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