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Al(2)O(3) is reduced by electrolysis at ...

`Al_(2)O_(3)` is reduced by electrolysis at low potentials and high current. If `4.0 xx 10^(4)` amperes of currernt is passed through molten `Al_(2)O_(3)` for 6 hours, what mass of aluminium is produced? (Assume 100 % current efficiency, At. Mass of `Al = 27 u`)

A

`1.3xx10^(4)g`

B

`9.0xx10^(3)g`

C

`8.1xx10^(4)g`

D

`2.4xx10^(5)g`

Text Solution

Verified by Experts

The correct Answer is:
C
`W=(E)/(96500)xxI xx t`
`W=(9)/(96500) xx 4.0xx10^(4) xx 6xx3600`
`=8.1 xx 10^(4)g `
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Al_2 O_3 is reduced by electrolysis at ow potentials and high currents, If 4.0 xx 10^(4) amperes of current is passed through molten Al_2O_3 fro 6 hours , what mass of alumininum is produced ? (Assume 100% current efficiency gt At mass of Al = 27 g "mol"^(-) ) .

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