1.

AI_(2)O_(3)is reduced by electrolysisat lowpotentials and high current if 4.0xx10^(4)amperes of curretnis passed through molten AI_(2)O_(3)for 6h what mass of aluminimum is produced ? (Assume 100% currentaluminimumatomicweightof AI=27)

Answer»

`9.0xx10^(3)` G
`8.1xx10^(4)` g
`2.4 xx10^(3)`g
`1.3 xx10^(4) g`

SOLUTION :The reactionis `AI^(3+) +3e^(-) rarr AI`
`therefore E_(AI)=("atomic WEIGHT")/(3)=27/3=9`
Now`w =("Eit")/(96500)=(9xx4xx10^(4)xx6xx60xx60)/(96500)`
`=8.05 xx10^(4) =8.1 xx10^(4) g`


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