Chapter 20, Problem 29E

(a)

Interpretation Introduction

To determine: The substance that is oxidized and the one that is reduced in the given voltaic cell.

(b)

Interpretation Introduction

To determine: The half-reactions that occur in the two half-cells.

(c)

Interpretation Introduction

To determine: The electrode that acts as anode and the one that acts as cathode.

(d)

Interpretation Introduction

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.

(e)

Interpretation Introduction

To determine: If the electrons flow from the silver electrode to the iron electrode or from the iron to the silver.

(f)

Interpretation Introduction

To determine: The direction in which the cations and anions migrate through the solution.