Question 1

What is the reaction at the anode in a breathalyzer?

Accepted Answer

A) Ethanol is oxidized to acetic acid. 
B) Acetic acid is reduced to ethanol. 
C) Oxygen is reduced. 
D) Hydrogen is oxidized. 
E) Ethanol is oxidized to acetaldehyde. 
A) Ethanol is oxidized to acetic acid. 
B) Acetic acid is reduced to ethanol. 
C) Oxygen is reduced. 
D) Hydrogen is oxidized. 
E) Ethanol is oxidized to acetaldehyde.

Question 2

Use the provided reduction potentials to calculate the equilibrium constant (K)for the following balanced redox reaction at 25 °C: 2Al(s)+ 3Mg2+(aq)→ 2Al3+(aq)+ 3Mg(s)
E°(Al3+/Al)= -1.66 V and E°(Mg2+/Mg)= -2.37 V

Accepted Answer

A) 1.1 × 1072 
B) 8.9 × 10-70 
C) 9.7 × 10-73 
D) 1.0 × 1024 
E) 4.6 × 1031 
A) 1.1 × 1072 
B) 8.9 × 10-70 
C) 9.7 × 10-73 
D) 1.0 × 1024 
E) 4.6 × 1031

Question 3

Give an example of an inert electrode.

Accepted Answer

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Question 4

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 5

A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is AgCl(s)+ e- → Ag(s)+ Cl- (aq)E° = +0.222 V
The concentrations of chloride ion in the two compartments are 0.0222 mol L-1 and 2.22 mol L-1, respectively. The cell emf is ________ V.

Accepted Answer

A) 0.212 
B) 0.118 
C) 0.00222 
D) 22.2 
E) 0.232 
A) 0.212 
B) 0.118 
C) 0.00222 
D) 22.2 
E) 0.232

Question 6

What is the shorthand notation that represents the following galvanic cell reaction? 2Fe2+(aq)+ F2(g)→ 2Fe3+(aq)+ 2F-(aq)

Accepted Answer

A) Fe2+(aq)∣ Fe3+(aq)∣∣ F2(g)∣ F-(aq) 
B) Fe(s)∣ Fe2+(aq)∣∣ Fe3+(aq)F2(g)∣ F-(aq)∣ C(s) 
C) Pt(s)∣ Fe3+(aq), Fe2+(aq), F2(g)∣∣ F-(aq)∣ C(s) 
D) Pt(s)∣ Fe2+(aq), Fe3+(aq)∣∣ F2(g)∣ F-(aq)∣ C(s) 
A) Fe2+(aq)∣ Fe3+(aq)∣∣ F2(g)∣ F-(aq) 
B) Fe(s)∣ Fe2+(aq)∣∣ Fe3+(aq)F2(g)∣ F-(aq)∣ C(s) 
C) Pt(s)∣ Fe3+(aq), Fe2+(aq), F2(g)∣∣ F-(aq)∣ C(s) 
D) Pt(s)∣ Fe2+(aq), Fe3+(aq)∣∣ F2(g)∣ F-(aq)∣ C(s)

What is the reaction at the anode in a breathalyzer?

Use the provided reduction potentials to calculate the equilibrium constant (K)for the following balanced redox reaction at 25 °C: 2Al(s)+ 3Mg²⁺(aq)→ 2Al³⁺(aq)+ 3Mg(s) E°(Al³⁺/Al)= -1.66 V and E°(Mg²⁺/Mg)= -2.37 V

Give an example of an inert electrode.

Which of the following is the strongest oxidizing agent?

A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is AgCl(s)+ e^- → Ag(s)+ Cl^- (aq)E° = +0.222 V The concentrations of chloride ion in the two compartments are 0.0222 mol L^-1 and 2.22 mol L^-1, respectively. The cell emf is ________ V.

What is the shorthand notation that represents the following galvanic cell reaction? 2Fe²⁺(aq)+ F₂(g)→ 2Fe³⁺(aq)+ 2F^-(aq)

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

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 Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Exam 18: Electrochemistry

What is the reaction at the anode in a breathalyzer?

Use the provided reduction potentials to calculate the equilibrium constant (K)for the following balanced redox reaction at 25 °C: 2Al(s)+ 3Mg2+(aq)→ 2Al3+(aq)+ 3Mg(s) E°(Al3+/Al)= -1.66 V and E°(Mg2+/Mg)= -2.37 V

Give an example of an inert electrode.

Which of the following is the strongest oxidizing agent?

A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is AgCl(s)+ e- → Ag(s)+ Cl- (aq)E° = +0.222 V The concentrations of chloride ion in the two compartments are 0.0222 mol L-1 and 2.22 mol L-1, respectively. The cell emf is ________ V.

What is the shorthand notation that represents the following galvanic cell reaction? 2Fe2+(aq)+ F2(g)→ 2Fe3+(aq)+ 2F-(aq)

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

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 Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Use the provided reduction potentials to calculate the equilibrium constant (K)for the following balanced redox reaction at 25 °C: 2Al(s)+ 3Mg²⁺(aq)→ 2Al³⁺(aq)+ 3Mg(s) E°(Al³⁺/Al)= -1.66 V and E°(Mg²⁺/Mg)= -2.37 V

A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is AgCl(s)+ e^- → Ag(s)+ Cl^- (aq)E° = +0.222 V The concentrations of chloride ion in the two compartments are 0.0222 mol L^-1 and 2.22 mol L^-1, respectively. The cell emf is ________ V.

What is the shorthand notation that represents the following galvanic cell reaction? 2Fe²⁺(aq)+ F₂(g)→ 2Fe³⁺(aq)+ 2F^-(aq)