Question:
The standard electrode potential for Ni²⁺/Ni couple is -0.25 V and for Ag⁺/Ag couple is 0.80 V. These two couples are connected to make an electrochemical cell. The redox reaction is spontaneous. The cell potential will be:
The standard electrode potential for Ni²⁺/Ni couple is -0.25 V and for Ag⁺/Ag couple is 0.80 V. These two couples are connected to make an electrochemical cell. The redox reaction is spontaneous. The cell potential will be:
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Remember: E°cell = E°cathode - E°anode
Updated On: Jul 14, 2025
+ 1.05 V
-1.05 V
+ 0.55 V
-0.55 V
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The Correct Option is A
Solution and Explanation
E°cell = E°cathode - E°anode = 0.80 V - (-0.25 V) = 1.05 V. Positive means spontaneous.
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