Unit 9.10: Cell Potential Under Nonstandard Conditions
Explain how a concentration cell works.
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Why does a potential exist between two half-cells with the same metal
but different ion concentrations?
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What happens to the concentrations in each half-cell as the
concentration cell operates?
Understand why Le Châtelier’s principle cannot be used to explain
electrochemical systems.
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Why is Le Châtelier’s principle not sufficient for predicting cell
potential changes?
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Which equation provides a better explanation for concentration effects
on electrochemical cells?
Use comparisons of Q values to determine how changes in the cell as it
progresses impact E relative to E°.
- What does it mean if Q < K in an electrochemical cell?
- How does increasing ion concentration affect E compared to E°?
Apply the Nernst equation qualitatively to discuss the impact of
concentration on cell potential.
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How does decreasing ion concentration affect cell potential according
to the Nernst equation?
- Why does E approach zero as the cell approaches equilibrium?