Question 1

For a dead battery

Accepted Answer

A) E is negative and ΔG is positive for the cell reaction. 
B) E is negative and ΔG is negative for the cell reaction. 
C) E is zero and ΔG is positive for the cell reaction. 
D) E is zero and ΔG is zero for the cell reaction. 
A) E is negative and ΔG is positive for the cell reaction. 
B) E is negative and ΔG is negative for the cell reaction. 
C) E is zero and ΔG is positive for the cell reaction. 
D) E is zero and ΔG is zero for the cell reaction.

Question 2

Shown below is a galvanic cell with anode compartment b containing anode a and cathode compartment d containing cathode c.Electrons flow through wire f,ions flow through salt bridge e,and the cell potential is read using voltmeter g.
This galvanic cell uses the reaction: Cu(s)+ 2 AgS1U1P1+S1S1P0(aq) $\rarr$ 2 Ag(s)+ CuS1U1P12+S1S1P0(aq).  
-If the concentrations of Ag+(aq)and Cu2+(aq)are varied in this galvanic cell,which of the following four cells has the largest cell potential?

Accepted Answer

A) [Ag+] = 0.10 M and [Cu2+] = 0.10 M 
B) [Ag+] = 1.0 M and [Cu2+] = 0.10 M 
C) [Ag+] = 0.10 M and [Cu2+] = 1.0 M 
D) [Ag+] = 1.0 M and [Cu2+] = 1.0 M 
A) [Ag+] = 0.10 M and [Cu2+] = 0.10 M 
B) [Ag+] = 1.0 M and [Cu2+] = 0.10 M 
C) [Ag+] = 0.10 M and [Cu2+] = 1.0 M 
D) [Ag+] = 1.0 M and [Cu2+] = 1.0 M

Question 3

What is the relationship between the standard cell potentials,E°,for the following two galvanic cell reactions?
I.3 Cu2+(aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al3+(aq)
II.6 Cu2+(aq)+ 4 Al(s)→ 6 Cu(s)+ 4 Al3+(aq)

Accepted Answer

A) E°(I)= E°(II) 
B) E°(I)=   E°(II) 
C) E°(I)= 2E°(II) 
D) E°(I)= E°(II)2 
A) E°(I)= E°(II) 
B) E°(I)=   E°(II) 
C) E°(I)= 2E°(II) 
D) E°(I)= E°(II)2

Question 4

Consider the following galvanic cell.  
-Identify the anode and cathode,and indicate the direction of ion flow to and from each electrode.

Accepted Answer

A) Fe is the anode and Sn is the cathode;Fe2+ ions flow to the anode and Sn2+ ions flow from the cathode. 
B) Fe is the anode and Sn is the cathode;Sn2+ ions flow to the cathode and Fe2+ ions flow from the anode. 
C) Sn is the anode and Al is the cathode;Fe2+ ions flow to the cathode and Sn2+ ions flow from the anode. 
D) Sn is the anode and Al is the cathode;Sn2+ ions flow to the anode and Fe2+ ions flow from the cathode. 
A) Fe is the anode and Sn is the cathode;Fe2+ ions flow to the anode and Sn2+ ions flow from the cathode. 
B) Fe is the anode and Sn is the cathode;Sn2+ ions flow to the cathode and Fe2+ ions flow from the anode. 
C) Sn is the anode and Al is the cathode;Fe2+ ions flow to the cathode and Sn2+ ions flow from the anode. 
D) Sn is the anode and Al is the cathode;Sn2+ ions flow to the anode and Fe2+ ions flow from the cathode.

Question 5

Consider the galvanic cell shown below.  
-What is the shorthand notation for the cell?

Accepted Answer

A) Al(s)| Al3+(aq)|| Co(s)| Co2+(aq) 
B) Al(s)| Al3+(aq)|| Co2+(aq)| Co(s) 
C) Co(s)| Co2+(aq)|| Al(s)| Al3+(aq) 
D) Co(s)| Co2+(aq)|| Al3+(aq)| Al(s) 
A) Al(s)| Al3+(aq)|| Co(s)| Co2+(aq) 
B) Al(s)| Al3+(aq)|| Co2+(aq)| Co(s) 
C) Co(s)| Co2+(aq)|| Al(s)| Al3+(aq) 
D) Co(s)| Co2+(aq)|| Al3+(aq)| Al(s)

Question 6

Which of the following statements concerning the rusting of iron is false?

Accepted Answer

A) The oxidation site can occur at a different place on the metal surface than the reduction site. 
B) The metal is reduced. 
C) The rusting of iron requires both oxygen and water. 
D) Salt increases the rate of corrosion by providing ions to carry the current. 
A) The oxidation site can occur at a different place on the metal surface than the reduction site. 
B) The metal is reduced. 
C) The rusting of iron requires both oxygen and water. 
D) Salt increases the rate of corrosion by providing ions to carry the current.

Question 7

Reduction half-reactions with corresponding standard half-cell potentials are shown below.
Ag+(aq)+ 1 e- → Ag(s)E° = +0.80 V
Zn2+(aq)+ 2 e- → Zn(s)E° = -0.76 V
Al3+(aq)+ 3 e- → Al(s)E° = -1.66 V
Of the species above,the strongest oxidizing agent is ________,and the strongest reducing agent is ________.

Accepted Answer

Question 8

-The cell reaction 2 Fe3+(aq)+ Zn(s)→ Zn2+(aq)+ 2 Fe2+(aq)occurs in the galvanic cell shown above.Where should the Fe3+(aq)and Fe2+(aq)be found?

Accepted Answer

A) Half-cell (
A) contains Fe3+(aq)and half-cell (
B) contains Fe2+(aq). 
B) Half-cell (
A) contains Fe2+(aq)and half-cell (
B) contains Fe3+(aq). 
C) Half-cell (
A) contains Fe3+(aq)and Fe2+(aq). 
D) Half-cell (
B) contains Fe3+(aq)and Fe2+(aq). 
A) Half-cell (
A) contains Fe3+(aq)and half-cell (
B) contains Fe2+(aq). 
B) Half-cell (
A) contains Fe2+(aq)and half-cell (
B) contains Fe3+(aq). 
C) Half-cell (
A) contains Fe3+(aq)and Fe2+(aq). 
D) Half-cell (
B) contains Fe3+(aq)and Fe2+(aq).

Question 9

What is the relation between joules (J),volts (V),and coulombs (C)?

Accepted Answer

A) 1 J = 1 V × 1 C 
B) 1 J = 1 V ÷ 1 C 
C) 1 J = 1 C ÷ 1 V 
D) 1 J = 1 V × 1 C2 
A) 1 J = 1 V × 1 C 
B) 1 J = 1 V ÷ 1 C 
C) 1 J = 1 C ÷ 1 V 
D) 1 J = 1 V × 1 C2

Question 10

What is the shorthand notation that represents the following galvanic cell reaction?
2 Fe2+(aq)+ Cl2(g)→ 2 Fe3+(aq)+ 2 Cl-(aq)

Accepted Answer

A) Fe2+(aq)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl-(aq) 
B) Fe(s)∣ Fe2+(aq)∣∣ Fe3+(aq)Cl2(g)∣ Cl-(aq)∣ C(s) 
C) Pt(s)∣ Fe3+(aq),Fe2+(aq),Cl2(g)∣∣ Cl-(aq)∣ C(s) 
D) Pt(s)∣ Fe2+(aq),Fe3+(aq)∣∣ Cl2(g)∣ Cl-(aq)∣ C(s) 
A) Fe2+(aq)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl-(aq) 
B) Fe(s)∣ Fe2+(aq)∣∣ Fe3+(aq)Cl2(g)∣ Cl-(aq)∣ C(s) 
C) Pt(s)∣ Fe3+(aq),Fe2+(aq),Cl2(g)∣∣ Cl-(aq)∣ C(s) 
D) Pt(s)∣ Fe2+(aq),Fe3+(aq)∣∣ Cl2(g)∣ Cl-(aq)∣ C(s)

Question 11

Consider the galvanic cell shown below.  
-Identify the anode and cathode,and indicate the direction of Na+ ion and NO3- ion flow from the salt bridge.

Accepted Answer

A) Al is the anode and Co is the cathode;Na+ ions flow into half-cell compartment (
A) and NO3- ions flow into half-cell compartment (
B) . 
B) Al is the anode and Co is the cathode;NO3- ions flow into half-cell compartment (
A) and Na+ ions flow into half-cell compartment (
B) . 
C) Co is the anode and Al is the cathode;Na+ ions flow into half-cell compartment (
A) and NO3- ions flow into half-cell compartment (
B) . 
D) Co is the anode and Al is the cathode;NO3- ions flow into half-cell compartment (
A) and Na+ ions flow into half-cell compartment (
B) . 
A) Al is the anode and Co is the cathode;Na+ ions flow into half-cell compartment (
A) and NO3- ions flow into half-cell compartment (
B) . 
B) Al is the anode and Co is the cathode;NO3- ions flow into half-cell compartment (
A) and Na+ ions flow into half-cell compartment (
B) . 
C) Co is the anode and Al is the cathode;Na+ ions flow into half-cell compartment (
A) and NO3- ions flow into half-cell compartment (
B) . 
D) Co is the anode and Al is the cathode;NO3- ions flow into half-cell compartment (
A) and Na+ ions flow into half-cell compartment (
B) .

Question 12

Using the following standard reduction potentials
Fe3+(aq)+ e- → Fe2+(aq)E° = +0.77 V
Pb2+(aq)+ 2 e- → Pb(s)E° = -0.13 V
Calculate the standard cell potential for the galvanic cell reaction given below,and determine whether or not this reaction is spontaneous under standard conditions.
Pb2+(aq)+ 2 Fe2+(aq)→ 2 Fe3+(aq)+ Pb(s)

Accepted Answer

A) E° = -0.90 V,nonspontaneous 
B) E° = -0.90 V,spontaneous 
C) E° = +0.90 V,nonspontaneous 
D) E° = +0.90 V,spontaneous 
A) E° = -0.90 V,nonspontaneous 
B) E° = -0.90 V,spontaneous 
C) E° = +0.90 V,nonspontaneous 
D) E° = +0.90 V,spontaneous

Question 13

For the hypothetical reaction 3 A + 2 Bx → 3 Ay + 2 B,E° = 0.85 V and G° = -495 kJ.For this reaction the values of x and y are ________ and ________.

Accepted Answer

Question 14

The gas OF2 can be produced from the electrolysis of an aqueous solution of KF,as shown in the equation below.
OF2(g)+ 2 H+(aq)+ 4 e- → H2O(l)+ 2 F-(aq)E° = +2.15 V
Using the given standard reduction potential,calculate the amount of OF2 that is produced,and the electrode at which the OF2 is produced,upon the passage of 0.240 faradays through an aqueous KF solution.

Accepted Answer

A) 3)24 g of OF2 at the anode 
B) 13.0 g of OF2 at the anode 
C) 3)24 g of OF2 at the cathode 
D) 13.0 g of OF2 at the cathode 
A) 3)24 g of OF2 at the anode 
B) 13.0 g of OF2 at the anode 
C) 3)24 g of OF2 at the cathode 
D) 13.0 g of OF2 at the cathode

Question 15

The bright colors of anodized aluminum are due to

Accepted Answer

A) electrodeposition of organic dyes on the aluminum surface. 
B) the formation of an aluminum alloy with chromium and copper. 
C) iridescence involving the semitransparent outer layer of Al2O3. 
D) trapping of organic dye molecules in a spongy Al2O3 matrix. 
A) electrodeposition of organic dyes on the aluminum surface. 
B) the formation of an aluminum alloy with chromium and copper. 
C) iridescence involving the semitransparent outer layer of Al2O3. 
D) trapping of organic dye molecules in a spongy Al2O3 matrix.

Question 16

Based on the following information,
Cl2(g)+ 2 e- → 2 Cl-(aq)E° = + 1.36 V
Mg2+(aq)+ 2 e- → 2 Mg(s)E° = -2.37 V
Which of the following chemical species is the strongest reducing agent?

Accepted Answer

A) Cl2(g) 
B) Mg2+(aq) 
C) Cl-(aq) 
D) Mg(s) 
A) Cl2(g) 
B) Mg2+(aq) 
C) Cl-(aq) 
D) Mg(s)

Question 17

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below?
3 Cu2+(aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al3+(aq)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 6 
A) 1 
B) 2 
C) 3 
D) 6

Question 18

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 320.minutes?

Accepted Answer

A) 27.6 g 
B) 49.2 g 
C) 82.4 g 
D) 248 g 
A) 27.6 g 
B) 49.2 g 
C) 82.4 g 
D) 248 g

Question 19

At 25°C,E° = +1.88 V for a cell based on the reaction
3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al3+(aq)+ 3 Cl-(aq).
Find the cell potential E if [Al3+] = 0.20 M and [Cl-] = 0.010 M.

Accepted Answer

A) +2.01 V 
B) +2.04 V 
C) +2.28 V 
D) cannot be calculated without the amounts of AgCl,Al,and Ag 
A) +2.01 V 
B) +2.04 V 
C) +2.28 V 
D) cannot be calculated without the amounts of AgCl,Al,and Ag

Question 20

What is the reduction half-reaction for the following overall cell reaction?
Ni2+(aq)+ 2 Ag(s)→ Ni(s)+ 2 Ag+(aq)

Accepted Answer

A) Ag(s)+ e- → Ag+(aq) 
B) Ag+(aq)+ e- → Ag(s) 
C) Ni2+(aq)+ 2 e- → Ni(s) 
D) Ni2+(aq)+ e- → Ni(s) 
A) Ag(s)+ e- → Ag+(aq) 
B) Ag+(aq)+ e- → Ag(s) 
C) Ni2+(aq)+ 2 e- → Ni(s) 
D) Ni2+(aq)+ e- → Ni(s)

For a dead battery

What is the relationship between the standard cell potentials,E°,for the following two galvanic cell reactions? I.3 Cu²⁺⁽^aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al³⁺(aq) II.6 Cu²⁺⁽^aq)+ 4 Al(s)→ 6 Cu(s)+ 4 Al³⁺(aq)

Consider the following galvanic cell. -Identify the anode and cathode,and indicate the direction of ion flow to and from each electrode.

Consider the galvanic cell shown below. -What is the shorthand notation for the cell?

Which of the following statements concerning the rusting of iron is false?

-The cell reaction 2 Fe³⁺(aq)+ Zn(s)→ Zn²⁺(aq)+ 2 Fe²⁺(aq)occurs in the galvanic cell shown above.Where should the Fe³⁺(aq)and Fe²⁺(aq)be found?

What is the relation between joules (J),volts (V),and coulombs (C)?

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq)+ Cl₂(g)→ 2 Fe³⁺(aq)+ 2 Cl^-(aq)

Consider the galvanic cell shown below. -Identify the anode and cathode,and indicate the direction of Na⁺ ion and NO₃^- ion flow from the salt bridge.

For the hypothetical reaction 3 A + 2 B^x → 3 A^y + 2 B,E° = 0.85 V and G° = -495 kJ.For this reaction the values of x and y are and .

The bright colors of anodized aluminum are due to

Based on the following information, Cl₂(g)+ 2 e^- → 2 Cl^-(aq)E° = + 1.36 V Mg²⁺(aq)+ 2 e^- → 2 Mg(s)E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Cu²⁺⁽^aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al³⁺(aq)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 320.minutes?

At 25°C,E° = +1.88 V for a cell based on the reaction 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al³⁺(aq)+ 3 Cl^-(aq). Find the cell potential E if [Al³⁺] = 0.20 M and [Cl^-] = 0.010 M.

What is the reduction half-reaction for the following overall cell reaction? Ni²⁺(aq)+ 2 Ag(s)→ Ni(s)+ 2 Ag⁺(aq)

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

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Exam 17: Electrochemistry

For a dead battery

What is the relationship between the standard cell potentials,E°,for the following two galvanic cell reactions? I.3 Cu2+(aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al3+(aq) II.6 Cu2+(aq)+ 4 Al(s)→ 6 Cu(s)+ 4 Al3+(aq)

Consider the following galvanic cell. -Identify the anode and cathode,and indicate the direction of ion flow to and from each electrode.

Consider the galvanic cell shown below. -What is the shorthand notation for the cell?

Which of the following statements concerning the rusting of iron is false?

-The cell reaction 2 Fe3+(aq)+ Zn(s)→ Zn2+(aq)+ 2 Fe2+(aq)occurs in the galvanic cell shown above.Where should the Fe3+(aq)and Fe2+(aq)be found?

What is the relation between joules (J),volts (V),and coulombs (C)?

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe2+(aq)+ Cl2(g)→ 2 Fe3+(aq)+ 2 Cl-(aq)

Consider the galvanic cell shown below. -Identify the anode and cathode,and indicate the direction of Na+ ion and NO3- ion flow from the salt bridge.

For the hypothetical reaction 3 A + 2 Bx → 3 Ay + 2 B,E° = 0.85 V and G° = -495 kJ.For this reaction the values of x and y are ________ and ________.

The bright colors of anodized aluminum are due to

Based on the following information, Cl2(g)+ 2 e- → 2 Cl-(aq)E° = + 1.36 V Mg2+(aq)+ 2 e- → 2 Mg(s)E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Cu2+(aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al3+(aq)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 320.minutes?

At 25°C,E° = +1.88 V for a cell based on the reaction 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al3+(aq)+ 3 Cl-(aq). Find the cell potential E if [Al3+] = 0.20 M and [Cl-] = 0.010 M.

What is the reduction half-reaction for the following overall cell reaction? Ni2+(aq)+ 2 Ag(s)→ Ni(s)+ 2 Ag+(aq)

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

What is the relationship between the standard cell potentials,E°,for the following two galvanic cell reactions? I.3 Cu²⁺⁽^aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al³⁺(aq) II.6 Cu²⁺⁽^aq)+ 4 Al(s)→ 6 Cu(s)+ 4 Al³⁺(aq)

-The cell reaction 2 Fe³⁺(aq)+ Zn(s)→ Zn²⁺(aq)+ 2 Fe²⁺(aq)occurs in the galvanic cell shown above.Where should the Fe³⁺(aq)and Fe²⁺(aq)be found?

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq)+ Cl₂(g)→ 2 Fe³⁺(aq)+ 2 Cl^-(aq)

Consider the galvanic cell shown below. -Identify the anode and cathode,and indicate the direction of Na⁺ ion and NO₃^- ion flow from the salt bridge.

For the hypothetical reaction 3 A + 2 B^x → 3 A^y + 2 B,E° = 0.85 V and G° = -495 kJ.For this reaction the values of x and y are and .

Based on the following information, Cl₂(g)+ 2 e^- → 2 Cl^-(aq)E° = + 1.36 V Mg²⁺(aq)+ 2 e^- → 2 Mg(s)E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Cu²⁺⁽^aq)+ 2 Al(s)→ 3 Cu(s)+ 2 Al³⁺(aq)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 320.minutes?

At 25°C,E° = +1.88 V for a cell based on the reaction 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al³⁺(aq)+ 3 Cl^-(aq). Find the cell potential E if [Al³⁺] = 0.20 M and [Cl^-] = 0.010 M.

What is the reduction half-reaction for the following overall cell reaction? Ni²⁺(aq)+ 2 Ag(s)→ Ni(s)+ 2 Ag⁺(aq)