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Which one is correct among the following...

Which one is correct among the following give, the half cell emf's ` E^(0) Cu^(+2)//Cu=0.337V and E_(Cu^(+1)//Cu)^(0) = 0.521 V `

A

`Cu^(+1)` disproportionates

B

Cu and `Cu^(+2)` comproportionates

C

`E_(Cu//Cu^(+2))^(0) + E_(Cu^(+)//Cu)^(0)` is positive

D

`E_(Cu//Cu^(+2))^(0) + E_(Cu^(+)//Cu)^(0)` is negative

Text Solution

Verified by Experts

The correct Answer is:
A, C

and also
`Cu^(+2) + 2e^(-) to Cu , DeltaG_1^(0) = -2 xx 0.337 , 2Cu^(+1) + 2e^(-) to 2Cu , DeltaG_2^(0) = -2 xx 0.521`
`Cu+ 2Cu^(+1) to Cu^(+2) + 2Cu , DeltaG_3^(0) = -2 xx E^(0) , E^(0) = 0.521 - 0.337 = + (0.184V)`
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