Question

Problem 20.29

A voltaic cell similar to that shown in Figure 20.5 in the textbook is constructed. One electrode compartment consists of a silver strip placed in a solution of AgNO3, and the other has an iron strip placed in a solution of FeCl2. The overall cell reaction is
Fe(s)+2Ag+(aq)→Fe2+(aq)+2Ag(s)

Part A

What is being oxidized?

Express your answer as a chemical expression.

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Part B

What is being reduced?

Express your answer as a chemical expression.

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Part C

Write the half-reactions that occur in the two electrode compartments.

Express your answer as a chemical equation. Identify all of the phases in your answer.

anode reaction:

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Part D

Express your answer as a chemical equation. Identify all of the phases in your answer.

cathode reaction:

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Part E

Which electrode is the anode, and which is the cathode?

Which electrode is the anode, and which is the cathode?

	Ag electrode is the anode, Fe electrode is the cathode.
	Fe electrode is the anode, Ag electrode is the cathode.

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Part F

Indicate the signs of the electrodes.

Indicate the signs of the electrodes.

	Ag electrode is negative, Fe electrode is positive.
	Fe electrode is negative, Ag electrode is positive.

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Part G

Do electrons flow from the silver electrode to the iron electrode, or from the iron to the silver?

Do electrons flow from the silver electrode to the iron electrode, or from the iron to the silver?

	Electrons flow from the silver electrode to the iron electrode.
	Electrons flow from the iron electrode to the silver electrode.

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Part H

In which directions do the cations and anions migrate through the solution?

In which directions do the cations and anions migrate through the solution?

	Cations and anions migrate to the silver electrode.
	Cations and anions migrate to the iron electrode.
	Cations migrate to the iron electrode, anions migrate to the silver electrode.
	Cations migrate to the silver electrode, anions migrate to the iron electrode.

Answer 1

The net ionic chemical reaction is

PART A

Here Fe(Iron) is oxidized. The oxidation state change from 0 to +2

PART B

Here Silver is recduced. The oxidation sate changes from +1 to 0

PART C

At anode: The oxidation half cell reaction is

PART D

At cathode: The reduction halfcell reaction is

PART E

Fe electrode is anode and Ag electrode is Cathode

PART F

Ag electrode is positive and Fe electrode is negative

PART G

Electron flows from Fe electrode to Ag electrode

PART H

Cation migrate to the silver electrode and anions migrate to the iron electrode