Question 1

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

Accepted Answer

A)  Ag+(aq) ∣ Ag(s)   Pb(s) ∣ Pb2+(aq) 
B)  Ag(s) ∣ Ag+(aq)   Pb2+(aq) ∣ Pb(s) 
C)  Pb(s) ∣ Pb2+(aq)   Ag+(aq) ∣ Ag(s) 
D)  Pb2+(aq) ∣ Pb(s)   Ag(s) ∣ Ag+(aq) 
E)  Pb(s) ∣ Ag(s)   Pb2+(aq) ∣ Ag+(aq) 
A)  Ag+(aq) ∣ Ag(s)   Pb(s) ∣ Pb2+(aq) 
B)  Ag(s) ∣ Ag+(aq)   Pb2+(aq) ∣ Pb(s) 
C)  Pb(s) ∣ Pb2+(aq)   Ag+(aq) ∣ Ag(s) 
D)  Pb2+(aq) ∣ Pb(s)   Ag(s) ∣ Ag+(aq) 
E)  Pb(s) ∣ Ag(s)   Pb2+(aq) ∣ Ag+(aq)

Question 2

Match between columns Premises: Q = 1 Q < K Q > K ΔG° > 0 Q = K ΔG° < 0

Accepted Answer

The Answer of E°cell < 0 and Ecell > 0 is...

Question 3

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 0.0600 faradays through an aqueous KF solution.

Accepted Answer

A)  0.810 g of OF2 at the anode. 
B)  3.25 g of OF2 at the anode. 
C)  0.810 g of OF2 at the cathode. 
D)  3.25 g of OF2 at the cathode. 
A)  0.810 g of OF2 at the anode. 
B)  3.25 g of OF2 at the anode. 
C)  0.810 g of OF2 at the cathode. 
D)  3.25 g of OF2 at the cathode.

Question 4

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Pb(s)and Pb2+(aq).What species are produced at the electrodes under standard conditions?
Ag+(aq)+ e- → Ag(s)E° = +0.80 V
Pb2+(aq)+ 2 e- → Pb(s)E° = -0.13 V

Accepted Answer

A)  Ag(aq) is formed at the cathode and, Pb(s) is formed at the anode. 
B)  Ag(s) is formed at the cathode, and Pb2+(aq) is formed at the anode. 
C)  Pb(s) is formed at the cathode, and Ag+(aq) is formed at the anode. 
D)  Pb2+(aq) is formed at the cathode, and Cu(s) is formed at the anode. 
A)  Ag(aq) is formed at the cathode and, Pb(s) is formed at the anode. 
B)  Ag(s) is formed at the cathode, and Pb2+(aq) is formed at the anode. 
C)  Pb(s) is formed at the cathode, and Ag+(aq) is formed at the anode. 
D)  Pb2+(aq) is formed at the cathode, and Cu(s) is formed at the anode.

Question 5

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.) 2 K(s)+ I2(s)→ 2 K⁺(aq)+ 2 I⁻(aq)
K+(aq)+ e⁻ → K(s)E° = -2.93 V
I2(s)+ 2 e⁻ → 2 I⁻(aq)E° = +0.54 V

Accepted Answer

A)  +6.40 V 
B)  +1.85 V 
C)  -5.32 V 
D)  +3.47 V 
E)  +5.32 V 
A)  +6.40 V 
B)  +1.85 V 
C)  -5.32 V 
D)  +3.47 V 
E)  +5.32 V

Question 6

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 7

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I2(s)→ 2AI3+(aq)+ 6I-(aq)
The emf generated by the cell when [AI3+] = 3.0 × 10-3 M and [I-] = 0.50 M is ________ V.

Accepted Answer

A)  2.20 
B)  2.27 
C)  2.13 
D)  2.34 
E)  2.23 
A)  2.20 
B)  2.27 
C)  2.13 
D)  2.34 
E)  2.23

Question 8

Why are iron nails coated with zinc?

Accepted Answer

Zinc is more easily oxidized t

Question 9

Which of the following is the strongest oxidizing agent?

Accepted Answer

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

Question 10

What element is being oxidized in the following redox reaction?
C3H8O2(aq)+ KMnO4(aq)→ C3H2O4K2(aq)+ MnO2(aq)

Accepted Answer

A)  C 
B)  H 
C)  O 
D)  K 
E)  Mn 
A)  C 
B)  H 
C)  O 
D)  K 
E)  Mn

Question 11

Which of the following is the strongest oxidizing agent?

Accepted Answer

A)  H2O2(aq) 
B)  Cr3+(aq) 
C)  ClO2(g) 
D)  I2(s) 
E)  Mg(s) 
A)  H2O2(aq) 
B)  Cr3+(aq) 
C)  ClO2(g) 
D)  I2(s) 
E)  Mg(s)

Question 12

A galvanic cell consists of a Al3+/Al half-cell and a standard hydrogen electrode.If the Al3+/Al half-cell standard cell functions as the anode,and the standard cell potential is 1.66 V,what is the standard reduction potential for the Al3+/Al half-cell?

Accepted Answer

A)  - 1.66 V 
B)  - 0.55 V 
C)  + 0.55 V 
D)  + 1.66 V 
A)  - 1.66 V 
B)  - 0.55 V 
C)  + 0.55 V 
D)  + 1.66 V

Question 13

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

Accepted Answer

A)  Fe 
B)  Zn 
C)  Mn 
D)  Ag 
E)  Al 
A)  Fe 
B)  Zn 
C)  Mn 
D)  Ag 
E)  Al

Question 14

What element is being oxidized in the following redox reaction?
C3H8O2(aq)+ K2Cr2O7(aq)→ C3H4O4(aq)+ Cr+3(aq)

Accepted Answer

A)  C 
B)  H 
C)  O 
D)  K 
E)  Cr 
A)  C 
B)  H 
C)  O 
D)  K 
E)  Cr

Question 15

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn2+(aq,0.022 M)   Ag+(aq,2.7 M)∣ Ag(s)

Accepted Answer

A)  +1.01 V 
B)  -0.83 V 
C)  +1.31 V 
D)  +0.01 V 
E)  -0.66 V 
A)  +1.01 V 
B)  -0.83 V 
C)  +1.31 V 
D)  +0.01 V 
E)  -0.66 V

Question 16

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn2+(aq,1.8 M)   Ag+(aq,0.055 M)∣ Ag(s)

Accepted Answer

A)  -0.94 V 
B)  -0.85 V 
C)  +1.02 V 
D)  +0.98 V 
E)  +0.86 V 
A)  -0.94 V 
B)  -0.85 V 
C)  +1.02 V 
D)  +0.98 V 
E)  +0.86 V

Question 17

What element is being oxidized in the following redox reaction?
Ni2+(aq)+ NH4+(aq)→ Ni(s)+ NO3⁻(aq)

Accepted Answer

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

Question 18

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction?
MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

Accepted Answer

A)  H2C2O4 = 5, H2O = 8 
B)  H2C2O4 = 1, H2O = 1 
C)  H2C2O4 = 5, H2O = 1 
D)  H2C2O4 = 1, H2O = 4 
E)  H2C2O4 = 3, H2O = 2 
A)  H2C2O4 = 5, H2O = 8 
B)  H2C2O4 = 1, H2O = 1 
C)  H2C2O4 = 5, H2O = 1 
D)  H2C2O4 = 1, H2O = 4 
E)  H2C2O4 = 3, H2O = 2

Question 19

The electrolysis of molten AlCl3 for 2.50 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

Accepted Answer

A)  113 
B)  0.466 
C)  3.50 × 10-3 
D)  12.6 
E)  37.8 
A)  113 
B)  0.466 
C)  3.50 × 10-3 
D)  12.6 
E)  37.8

Question 20

What is the reaction at the anode in nickel-cadmium battery?

Accepted Answer

A)  Cadmium is reduced. 
B)  Nickel(II) hydroxide is produced. 
C)  Cadmium is oxidized. 
D)  Nickel is oxidized. 
E)  Nickel is reduced. 
A)  Cadmium is reduced. 
B)  Nickel(II) hydroxide is produced. 
C)  Cadmium is oxidized. 
D)  Nickel is oxidized. 
E)  Nickel is reduced.

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

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Pb(s)and Pb²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Pb²⁺(aq)+ 2 e^- → Pb(s)E° = -0.13 V

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)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I₂(s)→ 2AI³⁺(aq)+ 6I^-(aq) The emf generated by the cell when [AI³⁺] = 3.0 × 10^-3 M and [I^-] = 0.50 M is ________ V.

Why are iron nails coated with zinc?

Which of the following is the strongest oxidizing agent?

What element is being oxidized in the following redox reaction? C₃H₈O₂(aq)+ KMnO₄(aq)→ C₃H₂O₄K₂(aq)+ MnO₂(aq)

Which of the following is the strongest oxidizing agent?

A galvanic cell consists of a Al³⁺/Al half-cell and a standard hydrogen electrode.If the Al³⁺/Al half-cell standard cell functions as the anode,and the standard cell potential is 1.66 V,what is the standard reduction potential for the Al³+/Al half-cell?

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

What element is being oxidized in the following redox reaction? C₃H₈O₂(aq)+ K₂Cr₂O₇(aq)→ C₃H₄O₄(aq)+ Cr⁺³(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,0.022 M) Ag⁺(aq,2.7 M)∣ Ag(s)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,1.8 M) Ag⁺(aq,0.055 M)∣ Ag(s)

What element is being oxidized in the following redox reaction? Ni²⁺(aq)+ NH₄⁺(aq)→ Ni(s)+ NO₃⁻(aq)

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H₂C₂O₄and H₂O in the balanced reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

The electrolysis of molten AlCl₃ for 2.50 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

What is the reaction at the anode in nickel-cadmium battery?

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

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Exam 20: Electrochemistry

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

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Pb(s)and Pb2+(aq).What species are produced at the electrodes under standard conditions? Ag+(aq)+ e- → Ag(s)E° = +0.80 V Pb2+(aq)+ 2 e- → Pb(s)E° = -0.13 V

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)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I2(s)→ 2AI3+(aq)+ 6I-(aq) The emf generated by the cell when [AI3+] = 3.0 × 10-3 M and [I-] = 0.50 M is ________ V.

Why are iron nails coated with zinc?

Which of the following is the strongest oxidizing agent?

What element is being oxidized in the following redox reaction? C3H8O2(aq)+ KMnO4(aq)→ C3H2O4K2(aq)+ MnO2(aq)

Which of the following is the strongest oxidizing agent?

A galvanic cell consists of a Al3+/Al half-cell and a standard hydrogen electrode.If the Al3+/Al half-cell standard cell functions as the anode,and the standard cell potential is 1.66 V,what is the standard reduction potential for the Al3+/Al half-cell?

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

What element is being oxidized in the following redox reaction? C3H8O2(aq)+ K2Cr2O7(aq)→ C3H4O4(aq)+ Cr+3(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn2+(aq,0.022 M) Ag+(aq,2.7 M)∣ Ag(s)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn2+(aq,1.8 M) Ag+(aq,0.055 M)∣ Ag(s)

What element is being oxidized in the following redox reaction? Ni2+(aq)+ NH4+(aq)→ Ni(s)+ NO3⁻(aq)

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction? MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

The electrolysis of molten AlCl3 for 2.50 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

What is the reaction at the anode in nickel-cadmium battery?

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

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

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Pb(s)and Pb²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Pb²⁺(aq)+ 2 e^- → Pb(s)E° = -0.13 V

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)

The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s)+ 3I₂(s)→ 2AI³⁺(aq)+ 6I^-(aq) The emf generated by the cell when [AI³⁺] = 3.0 × 10^-3 M and [I^-] = 0.50 M is ________ V.

What element is being oxidized in the following redox reaction? C₃H₈O₂(aq)+ KMnO₄(aq)→ C₃H₂O₄K₂(aq)+ MnO₂(aq)

A galvanic cell consists of a Al³⁺/Al half-cell and a standard hydrogen electrode.If the Al³⁺/Al half-cell standard cell functions as the anode,and the standard cell potential is 1.66 V,what is the standard reduction potential for the Al³+/Al half-cell?

What element is being oxidized in the following redox reaction? C₃H₈O₂(aq)+ K₂Cr₂O₇(aq)→ C₃H₄O₄(aq)+ Cr⁺³(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,0.022 M) Ag⁺(aq,2.7 M)∣ Ag(s)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,1.8 M) Ag⁺(aq,0.055 M)∣ Ag(s)

What element is being oxidized in the following redox reaction? Ni²⁺(aq)+ NH₄⁺(aq)→ Ni(s)+ NO₃⁻(aq)

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H₂C₂O₄and H₂O in the balanced reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

The electrolysis of molten AlCl₃ for 2.50 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.