Question 1

Match the following.
-Q > K

Accepted Answer

A) Ecell = E°cell 
B) Ecell = 0 
C) E°cell cell cell > 0
F)Ecell > 0 
A) Ecell = E°cell 
B) Ecell = 0 
C) E°cell cell cell > 0
F)Ecell > 0 D

Question 2

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

Accepted Answer

A) Fe 
B) Pb 
C) Cu 
D) Sn 
E) Ni 
A) Fe 
B) Pb 
C) Cu 
D) Sn 
E) Ni C

Question 3

A redox reaction has an E° cell = 1.00 V.What can you conclude about the equilibrium constant(K)for the reaction?

Accepted Answer

A) K > 1 B) K < 1 C) K = 1 D) Nothing can be concluded from the data. A) K > 1 B) K < 1 C) K = 1 D) Nothing can be concluded from the data. A

Question 4

Determine the redox reaction represented by the following cell notation.
Mg(s)∣ Mg2+(aq)∣∣ Cu2+(aq)∣ Cu(s)

Accepted Answer

A) Cu(s)+ Mg2+(aq)→ Mg(s)+ Cu2+(aq) 
B) Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq) 
C) 2 Mg(s)+ Cu2+(aq)→ Cu(s)+ 2 Mg2+(aq) 
D) 2 Cu(s)+ Mg2+(aq)→ Mg(s)+ 2 Cu2+(aq) 
E) 3 Mg(s)+ 2 Cu2+(aq)→ 2 Cu(s)+ 3 Mg2+(aq) 
A) Cu(s)+ Mg2+(aq)→ Mg(s)+ Cu2+(aq) 
B) Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq) 
C) 2 Mg(s)+ Cu2+(aq)→ Cu(s)+ 2 Mg2+(aq) 
D) 2 Cu(s)+ Mg2+(aq)→ Mg(s)+ 2 Cu2+(aq) 
E) 3 Mg(s)+ 2 Cu2+(aq)→ 2 Cu(s)+ 3 Mg2+(aq)

Question 5

Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction.
Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)

Accepted Answer

A) -41 kJ 
B) -0.47 kJ 
C) 46 kJ 
D) 91 kJ 
E) -21 kJ 
A) -41 kJ 
B) -0.47 kJ 
C) 46 kJ 
D) 91 kJ 
E) -21 kJ

Question 6

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 7

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

Accepted Answer

A) I-(aq)+ Zn2+(aq) 
B) Ca(s)+ Mg2+(aq) 
C) H2(g)+ Cd2+(aq) 
D) Ag(s)+ Sn2+(aq) 
E) All of the above pairs will react. 
A) I-(aq)+ Zn2+(aq) 
B) Ca(s)+ Mg2+(aq) 
C) H2(g)+ Cd2+(aq) 
D) Ag(s)+ Sn2+(aq) 
E) All of the above pairs will react.

Question 8

Why are iron nails coated with zinc?

Accepted Answer

Zinc is more easily oxidized t

Question 9

How many kilowatt-hours of electricity are used to produce 3.00 kg of magnesium in the electrolysis of molten MgCl2 with an applied emf of 4.50 V?

Accepted Answer

A) 0.0336 
B) 0.0298 
C) 7.4 
D) 29.8 
E) 14.9 
A) 0.0336 
B) 0.0298 
C) 7.4 
D) 29.8 
E) 14.9

Question 10

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Mg(s)∣ Mg2+(aq,2.74 M)∣∣ Cu2+(aq,0.0033 M)∣ Cu(s)

Accepted Answer

A) -2.80 V 
B) 2.62 V 
C) 2.71 V 
D) 2.12 V 
E) -1.94 V 
A) -2.80 V 
B) 2.62 V 
C) 2.71 V 
D) 2.12 V 
E) -1.94 V

Question 11

What statement is not true about standard electrode potentials?

Accepted Answer

A) E°cell is positive for spontaneous reactions. 
B) Electrons will flow from more negative electrode to more positive electrode. 
C) The electrode potential of the standard hydrogen electrode is exactly zero. 
D) E°cell is the difference in voltage between the anode and the cathode. 
E) The electrode in any half-cell with a greater tendency to undergo reduction is positively charged relative to the standard hydrogen electrode and therefore has a positive E°. 
A) E°cell is positive for spontaneous reactions. 
B) Electrons will flow from more negative electrode to more positive electrode. 
C) The electrode potential of the standard hydrogen electrode is exactly zero. 
D) E°cell is the difference in voltage between the anode and the cathode. 
E) The electrode in any half-cell with a greater tendency to undergo reduction is positively charged relative to the standard hydrogen electrode and therefore has a positive E°.

Question 12

Which of the following is the strongest reducing agent?

Accepted Answer

A) Al(s) 
B) Zn(s) 
C) Mg(s) 
D) Al3+(aq) 
E) Mg2+(aq) 
A) Al(s) 
B) Zn(s) 
C) Mg(s) 
D) Al3+(aq) 
E) Mg2+(aq)

Question 13

Which metal can be oxidized with a Sn2+ solution?

Accepted Answer

A) Ag 
B) Al 
C) Pb 
D) Cu 
A) Ag 
B) Al 
C) Pb 
D) Cu

Question 14

Which of the following metals is the best reducing agent?

Accepted Answer

A) Al 
B) Zn 
C) Sn 
D) Ni 
A) Al 
B) Zn 
C) Sn 
D) Ni

Question 15

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below?
Al(s)∣ Al3+(aq)∣∣ Fe2+(aq)∣ Fe(s)

Accepted Answer

A) 2 Al(s)+ 3 Fe2+(aq)→ 2 Al3+(aq)+ 3 Fe(s) 
B) 3 Al(s)+ 2 Fe2+(aq)→ 3 Al3+(aq)+ 2 Fe(s) 
C) 2 Fe(s)+ 3 Al3+(aq)→ 2 Fe2+(aq)+ 3 Al(s) 
D) 3 Fe(s)+ 2 Al3+(aq)→ 3 Fe2+(aq)+ 2 Al(s) 
A) 2 Al(s)+ 3 Fe2+(aq)→ 2 Al3+(aq)+ 3 Fe(s) 
B) 3 Al(s)+ 2 Fe2+(aq)→ 3 Al3+(aq)+ 2 Fe(s) 
C) 2 Fe(s)+ 3 Al3+(aq)→ 2 Fe2+(aq)+ 3 Al(s) 
D) 3 Fe(s)+ 2 Al3+(aq)→ 3 Fe2+(aq)+ 2 Al(s)

Question 16

What is the reducing agent in the redox reaction represented by the following cell notation?
Zn(s)∣ Zn2+(aq)∣∣ Ag+(aq)∣ Ag(s)

Accepted Answer

A) Zn(s) 
B) Zn2+(aq) 
C) Ag+(aq) 
D) Ag(s) 
E) Pt 
A) Zn(s) 
B) Zn2+(aq) 
C) Ag+(aq) 
D) Ag(s) 
E) Pt

Question 17

Which of the following is the strongest oxidizing agent?

Accepted Answer

A) MnO2(s) 
B) Cl⁻(aq) 
C) Cu⁺(aq) 
D) SO42-(aq) 
E) MnO4⁻(aq) 
A) MnO2(s) 
B) Cl⁻(aq) 
C) Cu⁺(aq) 
D) SO42-(aq) 
E) MnO4⁻(aq)

Question 18

What element is being oxidized in the following redox reaction?
Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

Accepted Answer

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

Question 19

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

Accepted Answer

A) Pb2+(aq)+ Cu(s) 
B) Ag+(aq)+ Br⁻(aq) 
C) Li+(aq)+ Al(s) 
D) Fe3+(aq)+ Ni(s) 
E) None of the above pairs will react. 
A) Pb2+(aq)+ Cu(s) 
B) Ag+(aq)+ Br⁻(aq) 
C) Li+(aq)+ Al(s) 
D) Fe3+(aq)+ Ni(s) 
E) None of the above pairs will react.

Question 20

What is the standard cell potential for the voltaic cell formed from a Cu/Cu2+ half-cell and an Ag/Ag+ half-cell?

Accepted Answer

A) +1.26 V 
B) -1.26 V 
C) 0.46 V 
D) -0.46 V 
A) +1.26 V 
B) -1.26 V 
C) 0.46 V 
D) -0.46 V

Match the following. -Q > K

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

A redox reaction has an E° cell = 1.00 V.What can you conclude about the equilibrium constant(K)for the reaction?

Determine the redox reaction represented by the following cell notation. Mg(s)∣ Mg²⁺(aq)∣∣ Cu²⁺(aq)∣ Cu(s)

Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. Pb²⁺(aq)+ Cu(s)→ Pb(s)+ Cu²⁺(aq)

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)

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

Why are iron nails coated with zinc?

How many kilowatt-hours of electricity are used to produce 3.00 kg of magnesium in the electrolysis of molten MgCl₂ with an applied emf of 4.50 V?

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Mg(s)∣ Mg²⁺(aq,2.74 M)∣∣ Cu²⁺(aq,0.0033 M)∣ Cu(s)

What statement is not true about standard electrode potentials?

Which of the following is the strongest reducing agent?

Which metal can be oxidized with a Sn²⁺solution?

Which of the following metals is the best reducing agent?

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Fe²⁺(aq)∣ Fe(s)

What is the reducing agent in the redox reaction represented by the following cell notation? Zn(s)∣ Zn²⁺(aq)∣∣ Ag⁺(aq)∣ Ag(s)

Which of the following is the strongest oxidizing agent?

What element is being oxidized in the following redox reaction? Zn²⁺(aq)+ NH₄⁺(aq)→ Zn(s)+ NO₃⁻(aq)

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

What is the standard cell potential for the voltaic cell formed from a Cu/Cu²⁺half-cell and an Ag/Ag⁺half-cell?

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

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Filters

Exam 18: Electrochemistry

Match the following. -Q > K

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

A redox reaction has an E° cell = 1.00 V.What can you conclude about the equilibrium constant(K)for the reaction?

Determine the redox reaction represented by the following cell notation. Mg(s)∣ Mg2+(aq)∣∣ Cu2+(aq)∣ Cu(s)

Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)

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)

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

Why are iron nails coated with zinc?

How many kilowatt-hours of electricity are used to produce 3.00 kg of magnesium in the electrolysis of molten MgCl2 with an applied emf of 4.50 V?

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Mg(s)∣ Mg2+(aq,2.74 M)∣∣ Cu2+(aq,0.0033 M)∣ Cu(s)

What statement is not true about standard electrode potentials?

Which of the following is the strongest reducing agent?

Which metal can be oxidized with a Sn2+ solution?

Which of the following metals is the best reducing agent?

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al3+(aq)∣∣ Fe2+(aq)∣ Fe(s)

What is the reducing agent in the redox reaction represented by the following cell notation? Zn(s)∣ Zn2+(aq)∣∣ Ag+(aq)∣ Ag(s)

Which of the following is the strongest oxidizing agent?

What element is being oxidized in the following redox reaction? Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.

What is the standard cell potential for the voltaic cell formed from a Cu/Cu2+ half-cell and an Ag/Ag+ half-cell?

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Radioactivity and Nuclear Chemistry

Filters

Determine the redox reaction represented by the following cell notation. Mg(s)∣ Mg²⁺(aq)∣∣ Cu²⁺(aq)∣ Cu(s)

Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. Pb²⁺(aq)+ Cu(s)→ Pb(s)+ Cu²⁺(aq)

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)

How many kilowatt-hours of electricity are used to produce 3.00 kg of magnesium in the electrolysis of molten MgCl₂ with an applied emf of 4.50 V?

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Mg(s)∣ Mg²⁺(aq,2.74 M)∣∣ Cu²⁺(aq,0.0033 M)∣ Cu(s)

Which metal can be oxidized with a Sn²⁺solution?

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Fe²⁺(aq)∣ Fe(s)

What is the reducing agent in the redox reaction represented by the following cell notation? Zn(s)∣ Zn²⁺(aq)∣∣ Ag⁺(aq)∣ Ag(s)

What element is being oxidized in the following redox reaction? Zn²⁺(aq)+ NH₄⁺(aq)→ Zn(s)+ NO₃⁻(aq)

What is the standard cell potential for the voltaic cell formed from a Cu/Cu²⁺half-cell and an Ag/Ag⁺half-cell?