1.

The positive value of the standard electrode potential of Cu^(2+)//Cu indicates that ____

Answer»

this redox couple is a stronger reducing AGENT than the `H^(+)//H_(2)` couple.
this redox couple is a stronger oxidising agent than `H^(+)//H_(2)`.
Cu can DISPLACE `H_(2)` from acid.
Cu cannot displace `H_(2)` from acid.

Solution :* `(E_(H^(+)|H_(2))^(Theta)) lt (E_(Cu^(2+)|Cu)^(Theta))`
So following REACTION is possible.
`Cu_((aq))^(2+)+H_(2(g)) to Cu_((S)) +2H_((aq))^(+)`
* Here, hydrogen is oxidized and `Cu^(2+)|Cu` is strong oxidizing agent.
* The electrode having more `E^(@)` VALUE will act as strong oxidizing agent. Cu does not GET oxidized in this reaction. Cu does not replace `H_(2)` from the acid.
* Lower the value of standard reduction potential higher will be the reducing power.


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