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Aluminium oxide may be electorlysed at 1...

Aluminium oxide may be electorlysed at `1000^@C` to furnish aluminim metal (Atomic Mass `= 27 ` amu, `1 F = 96, 500 C)`. The cathode reaction is
`Al^3 + 3d^(-) rarr Al^@`
To prepare ` 5.12 kg` of aluminium metal by this method would require .

A

`5.49 xx 10^(7)` coulomb

B

`1.83 xx 10^(7)` coulomb

C

`5.49 xx 10^(4)` coulomb

D

`5.49 xx 10^(10)` coulomb

Text Solution

Verified by Experts

The correct Answer is:
A
`w = (E . Q)/(96500)`
`512 xx 10^(3) = (27 xx Q)/(3 xx 96500)`
`:. Q = 5.49 xx 10^(7) C`
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Aluminium oxide may be electorlysed at 1000^@C to furnish aluminim metal (Atomic Mass = 27 amu, 1 F = 96, 500 C) . The cathode reaction is Al^3 + 3d^(-) rarr Al^@ To prepare 5.12 kg of aluminimu metal by this method woold require .

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:

Calculate the amount of electricity required to deposite 0.9 g of aluminium by electrolysis of a salt containing its ion, if the electrode reaction is Al^(3+)+3e^(-)rarrAl , (atomic mass of Al =27, 1F=96500C )

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