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Aluminium oxide may be electrolysed at 1...

Aluminium oxide may be electrolysed at `1000^(@)`C to furnish aluminium metal (Atomic mass = 27 amu, 1 Faraday = 96500 Coulomb). The cathode reaction is `Al^(3+) + 3e^(-) rightarrow Al`. To prepare 5.12 kg of aluminium metal by this method would require:

A

`5.49xx10^(7)C` of electricity

B

`1.83xx10^(7)C` of electricity

C

`5.49xx10^(4)C` of electricity

D

`5.49xx10^(10)C` of electricity

Text Solution

Verified by Experts

The correct Answer is:
A
`Al^(3+)+3e^(-)toAl`
`(5.12xx10^(3))/(27)=189.62mol`
Charge`=189.62xx3xx96500=5.489xx10^(7)` coulomb.
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