1.

If galvanic cell is formed by standard hydrogen electrode with by E_(Cu^(2+)|Cu)^(Theta)=+0.34Vin standard condition, so what is Cu^(2+)|Cu electrode ?

Answer»

ANODE electrode, negative electrode
CATHODE electrode, positive electrode
None of above
Anode positive electrode

Solution :(a) `E_(cell)^(Theta)=E_("CATHOD")^(Theta)-E_("Anode")^(Theta)`
`=E_(H^(+)|H_(2))^(Theta)-E_(Cu^(2+)|Cu)^(Theta)`
`=0.0-(0.34)=0.34V(A)` is wrong
(b) `E_(cell)^(Theta)=E_("Cathod")^(Theta)-E_("Anode")^(Theta)`
`=E_(Cu^(2+)|Cu)^(Theta)-E_(H^(+)|H_(2))^(Theta)`
`=0.34-0.0=0.34V` So, (B) is true.
MEANS, `Cu^(2+)|Cu` Cathode (Positive) electrode and `H^(+)|H_(2)` anode.


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