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The standard reduction potential E for t...

The standard reduction potential E for the half reactions are as:
`Zn^(2+) + 2e^(-) to Zn" " E^(@)= -0.76 V`
`Cu^(2+) + 2e^(-) to Cu, E^(@)= 0.34 V`
The standard cell voltage for the cell reaction is?
`Zn + Cu^( 2+ ) to Zn^(2+)+ Cu`

A

0.42 V

B

-0.42 V

C

-1.1 V

D

1.10 V

Text Solution

Verified by Experts

The correct Answer is:
D
`E_("cell")^(@)= E_("Cathode")^(@)- E_("Anode")^(@)`
`E_("cell")^(@)= E_(Cu^(+2)//Cu)^(@)- E_(Zn^(+2)//Zn)^(@)`
`= 0.34 - (- 0.76) = 1.10 V`
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