Tell which of the following statements accurately describes the effect of adding CN^– to the cathode of a cell with a cell reaction: Cd + 2Ag^+ - 2Ag + Cd^2+, E° = 1.2 V

Question

Tell which of the following statements accurately describes the effect of adding CN^– to the cathode of a cell with a cell reaction: Cd + 2Ag^+ -> 2Ag + Cd^2+, E° = 1.2 V

Prashant Kotian · Accepted Answer

Correct answer: D. Adding CN^- to the cathode converts Ag^+ into the highly stable complex Ag(CN)2^-. This greatly lowers the standard reduction potential of the cathode half-reaction, which in turn causes the overall standard cell potential (E°) to decrease. Therefore, correct answer is D.

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