Question 1

Which of the following is the weakest oxidizing agent?

Accepted Answer

A) H2O2(aq) 
B) Fe3+(aq) 
C) ClO2(g) 
D) I2(s) 
E) Fe(s) 
A) H2O2(aq) 
B) Fe3+(aq) 
C) ClO2(g) 
D) I2(s) 
E) Fe(s)

Question 2

Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Pb(s)+ Br2(l)→ Pb2+(aq)+ 2 Br⁻(aq)

Accepted Answer

A) 1.20 V 
B) 0.94 V 
C) -0.94 V 
D) -1.20 V 
E) -0.60 V 
A) 1.20 V 
B) 0.94 V 
C) -0.94 V 
D) -1.20 V 
E) -0.60 V

Question 3

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Cu(s)and Cu2+(aq).What species are produced at the electrodes under standard conditions?
Ag+(aq)+ e- → Ag(s)E° = +0.80 V
Cu2+(aq)+ 2 e- → Cu(s)E° = +0.34 V

Accepted Answer

A) Ag(aq)is formed at the cathode and,Cu(s)is formed at the anode. 
B) Ag(s)is formed at the cathode,and Cu2+(aq)is formed at the anode. 
C) Cu(s)is formed at the cathode,and Ag+(aq)is formed at the anode. 
D) Cu2+(aq)is formed at the cathode,and Cu(s)is formed at the anode. 
A) Ag(aq)is formed at the cathode and,Cu(s)is formed at the anode. 
B) Ag(s)is formed at the cathode,and Cu2+(aq)is formed at the anode. 
C) Cu(s)is formed at the cathode,and Ag+(aq)is formed at the anode. 
D) Cu2+(aq)is formed at the cathode,and Cu(s)is formed at the anode.

Question 4

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)4⁻ and ClO⁻ in the balanced reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

Accepted Answer

A) Cr(OH)4⁻ = 2,ClO⁻ = 3 
B) Cr(OH)4⁻ = 1,ClO⁻ = 1 
C) Cr(OH)4⁻ = 1,ClO⁻ = 2 
D) Cr(OH)4⁻ = 2,ClO⁻ = 6 
E) Cr(OH)4⁻ = 6,ClO⁻ = 5 
A) Cr(OH)4⁻ = 2,ClO⁻ = 3 
B) Cr(OH)4⁻ = 1,ClO⁻ = 1 
C) Cr(OH)4⁻ = 1,ClO⁻ = 2 
D) Cr(OH)4⁻ = 2,ClO⁻ = 6 
E) Cr(OH)4⁻ = 6,ClO⁻ = 5

Question 5

Which of the following metal cations is the best oxidizing agent?

Accepted Answer

A) Co2+ 
B) Fe2+ 
C) Fe3+ 
D) Zn2+ 
A) Co2+ 
B) Fe2+ 
C) Fe3+ 
D) Zn2+

Question 6

What is undergoing oxidation in the redox reaction represented by the following cell notation?
Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt

Accepted Answer

A) H2(g) 
B) H+(aq) 
C) Pb2+(aq) 
D) Pb(s) 
E) Pt 
A) H2(g) 
B) H+(aq) 
C) Pb2+(aq) 
D) Pb(s) 
E) Pt

Question 7

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺ and Fe3+ in the balanced reaction?
Fe2+(aq)+ MnO4⁻(aq)→ Fe3+(aq)+ Mn2+(aq)

Accepted Answer

A) H+ = 2,Fe3+ = 3 
B) H+ = 8,Fe3+ = 5 
C) H+ = 3,Fe3+ = 2 
D) H+ = 5,Fe3+ = 1 
E) H+ = 8,Fe3+ = 1 
A) H+ = 2,Fe3+ = 3 
B) H+ = 8,Fe3+ = 5 
C) H+ = 3,Fe3+ = 2 
D) H+ = 5,Fe3+ = 1 
E) H+ = 8,Fe3+ = 1

Question 8

How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
Mg(s)+ Al3+(aq)→ Al(s)+ Mg2+(aq)

Accepted Answer

A) 6 
B) 2 
C) 3 
D) 1 
E) 4 
A) 6 
B) 2 
C) 3 
D) 1 
E) 4

Question 9

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Fe(s)∣ Fe3+(aq,0.0011 M)∣∣ Fe3+(aq,2.33 M)∣ Fe(s)

Accepted Answer

A) 0.066 V 
B) -0.036 V 
C) 0.00 V 
D) -0.099 V 
E) 0.20 V 
A) 0.066 V 
B) -0.036 V 
C) 0.00 V 
D) -0.099 V 
E) 0.20 V

Question 10

What element is being oxidized in the following redox reaction?
Mg2+(aq)+ NH4+(aq)→ Mg(s)+ NO3⁻(aq)

Accepted Answer

A) Mg 
B) N 
C) H 
D) O 
A) Mg 
B) N 
C) H 
D) O

Question 11

The standard emf for the cell using the overall cell reaction below is +2.20 V:
2Al(s)+ 3I2(s)→ 2Al3+(aq)+ 6I-(aq)
The emf generated by the cell when [Al3+] = 4.5 × 10-3 M and [I-] = 0.15 M is

Accepted Answer

A) 2.20 
B) 2.32 
C) 2.10 
D) 2.39 
E) 2.23 
A) 2.20 
B) 2.32 
C) 2.10 
D) 2.39 
E) 2.23

Question 12

What is the difference between a voltaic cell and an electrolytic cell?

Accepted Answer

A voltaic cell contains a redox reaction

Question 13

What element is being oxidized in the following redox reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

Accepted Answer

A) Cr 
B) O 
C) H 
D) Cl 
A) Cr 
B) O 
C) H 
D) Cl

Question 14

Which of the following metals will dissolve in nitric acid but not hydrochloric?

Accepted Answer

A) Cd 
B) Cr 
C) Mn 
D) Ag 
E) Al 
A) Cd 
B) Cr 
C) Mn 
D) Ag 
E) Al

Question 15

Consider the galvanic cell,Zn(s)∣ Zn2+(aq)∣∣ Pb2+(aq)∣ Pb(s).Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive)?

Accepted Answer

A) increase the [Zn2+] concentration 
B) increase the [Pb2+] concentration 
C) increase the mass of Zn(s) 
D) decrease the mass of Zn(s) 
A) increase the [Zn2+] concentration 
B) increase the [Pb2+] concentration 
C) increase the mass of Zn(s) 
D) decrease the mass of Zn(s)

Question 16

Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)

Accepted Answer

A) 1.1 × 1072 
B) 8.9 × 10-73 
C) 1.1 × 10-72 
D) 1.0 × 1024 
E) 4.6 × 1031 
A) 1.1 × 1072 
B) 8.9 × 10-73 
C) 1.1 × 10-72 
D) 1.0 × 1024 
E) 4.6 × 1031

Question 17

Which of the following is the strongest oxidizing agent?

Accepted Answer

A) Br2(l) 
B) Au3+(aq) 
C) Ag(s) 
D) Br⁻(aq) 
E) Au(s) 
A) Br2(l) 
B) Au3+(aq) 
C) Ag(s) 
D) Br⁻(aq) 
E) Au(s)

Question 18

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO2 and H2O in the balanced reaction?
H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

Accepted Answer

A) ClO2 = 1,H2O = 1 
B) ClO2 = 1,H2O = 2 
C) ClO2 = 4,H2O = 3 
D) ClO2 = 4,H2O = 2 
E) ClO2 = 2,H2O = 2 
A) ClO2 = 1,H2O = 1 
B) ClO2 = 1,H2O = 2 
C) ClO2 = 4,H2O = 3 
D) ClO2 = 4,H2O = 2 
E) ClO2 = 2,H2O = 2

Question 19

What is the oxidizing agent in the redox reaction represented by the following cell notation?
Fe(s)∣ Fe3+(aq) Cl2(g)∣ Cl⁻(aq)∣ Pt

Accepted Answer

A) Fe(s) 
B) Fe3+(aq) 
C) Cl2(g) 
D) Cl⁻(aq) 
E) Pt 
A) Fe(s) 
B) Fe3+(aq) 
C) Cl2(g) 
D) Cl⁻(aq) 
E) Pt

Question 20

Determine the cell notation for the redox reaction given below.
Pb(s)+ 2 H⁺(aq)→ Pb2+(aq)+ H2(g)

Accepted Answer

A) H+(aq)∣ H2(g)∣ Pt ∣∣ Pb(s)∣ Pb2+(aq) 
B) H2(g)∣ H+(aq)∣ Pt ∣∣ Pb2+(aq)∣ Pb(s) 
C) Pb2+(aq)∣ Pb(s)∣∣ H2(g)∣ H+(aq)∣ Pt 
D) Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt 
E) Pb(s)∣ H2(g)∣∣ Pb2+(aq)∣ H+(aq)∣ Pt 
A) H+(aq)∣ H2(g)∣ Pt ∣∣ Pb(s)∣ Pb2+(aq) 
B) H2(g)∣ H+(aq)∣ Pt ∣∣ Pb2+(aq)∣ Pb(s) 
C) Pb2+(aq)∣ Pb(s)∣∣ H2(g)∣ H+(aq)∣ Pt 
D) Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt 
E) Pb(s)∣ H2(g)∣∣ Pb2+(aq)∣ H+(aq)∣ Pt

Which of the following is the weakest oxidizing agent?

Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Pb(s)+ Br₂(l)→ Pb²⁺(aq)+ 2 Br⁻(aq)

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Cu(s)and Cu²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Cu²⁺(aq)+ 2 e^- → Cu(s)E° = +0.34 V

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)₄^⁻and ClO^⁻ in the balanced reaction? Cr(OH)₄⁻(aq)+ ClO⁻(aq)→ CrO₄^2-(aq)+ Cl⁻(aq)

Which of the following metal cations is the best oxidizing agent?

What is undergoing oxidation in the redox reaction represented by the following cell notation? Pb(s)∣ Pb²⁺(aq)∣∣ H⁺(aq)∣ H₂(g)∣ Pt

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺and Fe³⁺ in the balanced reaction? Fe²⁺(aq)+ MnO₄⁻(aq)→ Fe³⁺(aq)+ Mn²⁺(aq)

How many electrons are transferred in the following reaction? (The reaction is unbalanced. ) Mg(s)+ Al³⁺(aq)→ Al(s)+ Mg²⁺(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Fe(s)∣ Fe³⁺(aq,0.0011 M)∣∣ Fe³⁺(aq,2.33 M)∣ Fe(s)

What element is being oxidized in the following redox reaction? Mg²⁺(aq)+ NH₄⁺(aq)→ Mg(s)+ NO₃⁻(aq)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I₂(s)→ 2Al³⁺(aq)+ 6I^-(aq) The emf generated by the cell when [Al³⁺] = 4.5 × 10^-³ M and [I^-] = 0.15 M is

What is the difference between a voltaic cell and an electrolytic cell?

What element is being oxidized in the following redox reaction? Cr(OH)₄⁻(aq)+ ClO⁻(aq)→ CrO₄^2-(aq)+ Cl⁻(aq)

Which of the following metals will dissolve in nitric acid but not hydrochloric?

Consider the galvanic cell,Zn(s)∣ Zn²⁺(aq)∣∣ Pb²⁺(aq)∣ Pb(s).Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive)?

Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 2 Al(s)+ 3 Mg²⁺(aq)→ 2 Al³⁺(aq)+ 3 Mg(s)

Which of the following is the strongest oxidizing agent?

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO₂and H₂O in the balanced reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂⁻(aq)+ O₂(g)

What is the oxidizing agent in the redox reaction represented by the following cell notation? Fe(s)∣ Fe³⁺(aq)Cl₂(g)∣ Cl⁻(aq)∣ Pt

Determine the cell notation for the redox reaction given below. Pb(s)+ 2 H⁺(aq)→ Pb²⁺(aq)+ H₂(g)

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Exam 18: Electrochemistry

Which of the following is the weakest oxidizing agent?

Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Pb(s)+ Br2(l)→ Pb2+(aq)+ 2 Br⁻(aq)

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Cu(s)and Cu2+(aq).What species are produced at the electrodes under standard conditions? Ag+(aq)+ e- → Ag(s)E° = +0.80 V Cu2+(aq)+ 2 e- → Cu(s)E° = +0.34 V

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)4⁻ and ClO⁻ in the balanced reaction? Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

Which of the following metal cations is the best oxidizing agent?

What is undergoing oxidation in the redox reaction represented by the following cell notation? Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺ and Fe3+ in the balanced reaction? Fe2+(aq)+ MnO4⁻(aq)→ Fe3+(aq)+ Mn2+(aq)

How many electrons are transferred in the following reaction? (The reaction is unbalanced. ) Mg(s)+ Al3+(aq)→ Al(s)+ Mg2+(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Fe(s)∣ Fe3+(aq,0.0011 M)∣∣ Fe3+(aq,2.33 M)∣ Fe(s)

What element is being oxidized in the following redox reaction? Mg2+(aq)+ NH4+(aq)→ Mg(s)+ NO3⁻(aq)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I2(s)→ 2Al3+(aq)+ 6I-(aq) The emf generated by the cell when [Al3+] = 4.5 × 10-3 M and [I-] = 0.15 M is

What is the difference between a voltaic cell and an electrolytic cell?

What element is being oxidized in the following redox reaction? Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

Which of the following metals will dissolve in nitric acid but not hydrochloric?

Consider the galvanic cell,Zn(s)∣ Zn2+(aq)∣∣ Pb2+(aq)∣ Pb(s).Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive)?

Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)

Which of the following is the strongest oxidizing agent?

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO2 and H2O in the balanced reaction? H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

What is the oxidizing agent in the redox reaction represented by the following cell notation? Fe(s)∣ Fe3+(aq)Cl2(g)∣ Cl⁻(aq)∣ Pt

Determine the cell notation for the redox reaction given below. Pb(s)+ 2 H⁺(aq)→ Pb2+(aq)+ H2(g)

Matter, Measurement, and Problem Solving

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Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

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Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Pb(s)+ Br₂(l)→ Pb²⁺(aq)+ 2 Br⁻(aq)

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Cu(s)and Cu²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Cu²⁺(aq)+ 2 e^- → Cu(s)E° = +0.34 V

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)₄^⁻and ClO^⁻ in the balanced reaction? Cr(OH)₄⁻(aq)+ ClO⁻(aq)→ CrO₄^2-(aq)+ Cl⁻(aq)

What is undergoing oxidation in the redox reaction represented by the following cell notation? Pb(s)∣ Pb²⁺(aq)∣∣ H⁺(aq)∣ H₂(g)∣ Pt

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺and Fe³⁺ in the balanced reaction? Fe²⁺(aq)+ MnO₄⁻(aq)→ Fe³⁺(aq)+ Mn²⁺(aq)

How many electrons are transferred in the following reaction? (The reaction is unbalanced. ) Mg(s)+ Al³⁺(aq)→ Al(s)+ Mg²⁺(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Fe(s)∣ Fe³⁺(aq,0.0011 M)∣∣ Fe³⁺(aq,2.33 M)∣ Fe(s)

What element is being oxidized in the following redox reaction? Mg²⁺(aq)+ NH₄⁺(aq)→ Mg(s)+ NO₃⁻(aq)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I₂(s)→ 2Al³⁺(aq)+ 6I^-(aq) The emf generated by the cell when [Al³⁺] = 4.5 × 10^-³ M and [I^-] = 0.15 M is

What element is being oxidized in the following redox reaction? Cr(OH)₄⁻(aq)+ ClO⁻(aq)→ CrO₄^2-(aq)+ Cl⁻(aq)

Consider the galvanic cell,Zn(s)∣ Zn²⁺(aq)∣∣ Pb²⁺(aq)∣ Pb(s).Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive)?

Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 2 Al(s)+ 3 Mg²⁺(aq)→ 2 Al³⁺(aq)+ 3 Mg(s)

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO₂and H₂O in the balanced reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂⁻(aq)+ O₂(g)

What is the oxidizing agent in the redox reaction represented by the following cell notation? Fe(s)∣ Fe³⁺(aq)Cl₂(g)∣ Cl⁻(aq)∣ Pt

Determine the cell notation for the redox reaction given below. Pb(s)+ 2 H⁺(aq)→ Pb²⁺(aq)+ H₂(g)