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The Standard reduction potential of E(Br...

The Standard reduction potential of `E_(Br^(3+)+Bi)^(@) "and" E_(Cu^(2+)//Cu)^(@)` are 0.226 V and 0.344V repectively A mixture of salts of Bi and Cu at unit concetration each is electrolysed at `25^(@)C` At what value of -`log[Cu^(2+)]` does bismuth starts to deposit during electrolysis

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The correct Answer is:
`[Cu^(2+)] = 10^(-4)M`
`E_(Cu^(2+)//Cu) = E_(Cu^(2+)//Cu)^(@) +(0.059)/(2) lg c[Cu^(2+)]`
`[Cu^(2+)] = 10^(-4)m`
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