How much charge is required for the following reductions:
(i) 1 mol of `Al^(3+)` to Al?
(ii). 1 mol of `Cu^(2+)` to Cu?
(iii). 1 mol of `MnO_(4)^(-)` to `Mn^(2+)`?

Answer

`a. 289500C` ,`b.193000C` , `c. 482500C`.

Explanation

`a.` `Al^(3+)+3e^(-) rarr Al`
`1 mol of Al=3F`
`=3xx96500`
`=289500C`
`b.` `Cu^(2+) +2e^(-) rarr Cu`
`1 mol of Cu=2F`
`=2xx06500`
`=193000C`
`c.` `MnO_(4)^(c-)+5e^(-) rarr Mn^(2+)`
`1 mol of MnO_(4)^(c-)=5F`
`=5xx96500C`
`=482500C`