The Standard Cell Potential for the Nickel-Cadmium Battery Is 1 $\rightarrow$

question 64

Multiple Choice

The standard cell potential for the nickel-cadmium battery is 1.35 V, and the cell reaction can be written as
2NiO(OH) (s) + 2H₂O(l) + Cd(s) $\rightarrow$ 2Ni(OH) ₂(s) + Cd(OH) ₂(s)
Which one of the following statements do you expect to be true based on the Nernst equation? Note Q = reaction quotient, and K = equilibrium constant for the cell reaction.

• A) As the battery is used, the cell voltage approaches zero because Q approaches K, in value.
• B) When the battery no longer works, the cell voltage is zero because Q = K.
• C) As the battery is used, the cell voltage does not change because Q equals 1.
• D) When the battery is fully charged, Q > K.
• E) When the battery is fully charged, Q < K.

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