
Concept explainers
(a)
To determine: The substance that is oxidized and the one that is reduced in the given voltaic cell.
(b)
To determine: The half-reactions that occur in the two half-cells.
(c)
To determine: The electrode that acts as anode and the one that acts as cathode.
(d)
To determine: The signs of the electrodes.
Solution: Anode is negative while cathode is positive.
Explanation:
In voltaic cell, the flow of electrons takes place from anode to cathode. Therefore, anode is the negatively charged electrode, while cathode is positively charged electrode.
Conclusion:
In voltaic cell, anode is the negatively charged electrode, while cathode is positively charged electrode.
To determine: The signs of the electrodes.
Explanation:
In voltaic cell, the flow of electrons takes place from anode to cathode. Therefore, anode is the negatively charged electrode, while cathode is positively charged electrode.
Conclusion:
In voltaic cell, anode is the negatively charged electrode, while cathode is positively charged electrode.
(e)
To determine: If the electrons flow from the silver electrode to the iron electrode or from the iron to the silver.
(f)
To determine: The direction in which the cations and anions migrate through the solution.

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Chapter 20 Solutions
Chemistry: The Central Science Plus Mastering Chemistry with Pearson eText -- Access Card Package (14th Edition)
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