Tell which of the following statements accurately describes the effect of adding CN− to the cathode

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 + Cd2+, E° = 1.2 V

Accepted Answer

$E_{cell} = E_{cell}^{o} - \frac{RT}{2F}.\ln\frac{\left\lbrack Cd^{2 +} \right\rbrack}{\left\lbrack Ag^{+} \right\rbrack^{2}}$

As CN^– will form complex with Ag⁺ ion in the cathodic compartment, E_cell will decrease.

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