Electrochemical Cell Potentials Can Be Used to Determine Equilibrium Constants $\rightarrow$

question 43

Multiple Choice

Electrochemical cell potentials can be used to determine equilibrium constants that would be otherwise difficult to determine because concentrations are small. Calculate the value of K_sp for CdS from the following data.
CdS(s) + 2e^- $\rightarrow$ Cd(s) + S^2-(aq)
E° = -1.21 V
Cd²⁺(aq) + 2e^- $\rightarrow$ Cd(s)
E° = -0.40 V

• A) 3 *10^-55
• B) 4 *10^-28
• C) 2 * 10^-14
• D) 3 *0 10⁺²⁷
• E) 1*10^-36

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