Question 1

In the formation of iron (II) oxide, which species is being reduced?
Fe( s ) + O2( g ) → FeO( s )

Accepted Answer

A)  FeO 
B)  Fe2O3 
C)  Fe 
D)  O2 
A)  FeO 
B)  Fe2O3 
C)  Fe 
D)  O2 D

Question 2

In the decomposition of hydrogen peroxide, which atom is being reduced?
H2O2( aq ) → H2( g ) + O2( g )

Accepted Answer

A)  H 
B)  O 
C)  both 
D)  neither 
A)  H 
B)  O 
C)  both 
D)  neither A

Question 3

Galvanic corrosion may occur only when two different metals are in contact with one another.

Accepted Answer

A) True 
 B)False  True

Question 4

In a redox reaction:

Accepted Answer

A)  there is a transfer of protons from one species to another. 
B)  electrons are created. 
C)  electrons are transferred between two species. 
D)  the reaction always moves in a reverse direction. 
A)  there is a transfer of protons from one species to another. 
B)  electrons are created. 
C)  electrons are transferred between two species. 
D)  the reaction always moves in a reverse direction.

Question 5

Which phrase best describes the half-reaction as written?
Na+ + e −  → Na

Accepted Answer

A)  oxidation 1/2 reaction 
B)  reduction 1/2 reaction 
C)  group 2 ionization 
D)  two electron transfer 
A)  oxidation 1/2 reaction 
B)  reduction 1/2 reaction 
C)  group 2 ionization 
D)  two electron transfer

Question 6

What is the E0 value for the Galvanic cell formed from these two half-reactions?

Accepted Answer

A)  +1.334 V 
B)  − 2.046 V 
C)  +2.046 V 
D)  +2.758 V 
A)  +1.334 V 
B)  − 2.046 V 
C)  +2.046 V 
D)  +2.758 V

Question 7

In the formation of iron (II) oxide, which species is being reduced?
Fe( s ) + O2( g ) → FeO( s )

Accepted Answer

A)  FeO 
B)  Fe2O3 
C)  Fe 
D)  O2 
A)  FeO 
B)  Fe2O3 
C)  Fe 
D)  O2

Question 8

Species with positive standard reduction potentials are excellent candidates for reduction reactions.

Accepted Answer

A) True 
 B)False

Question 9

Balance the following electrochemical reaction in acid:
MnO4 − ( aq ) + Zr( s ) ↔ Mn2+( aq ) + Zr2+( aq )

Accepted Answer

A)  2 MnO4 − ( aq ) + 16H+( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) + 8 H2O( l ) 
B)  2 MnO4 − ( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) 
C)  MnO4 − ( aq ) + Zr( s ) → Mn2+( aq )+ Zr2+( aq ) + 5 e −  
D)  2 MnO4 − ( aq ) + 8H+( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) + 8 H2O( l ) 
A)  2 MnO4 − ( aq ) + 16H+( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) + 8 H2O( l ) 
B)  2 MnO4 − ( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) 
C)  MnO4 − ( aq ) + Zr( s ) → Mn2+( aq )+ Zr2+( aq ) + 5 e −  
D)  2 MnO4 − ( aq ) + 8H+( aq ) + 5 Zr( s ) → 2 Mn2+( aq ) + 5 Zr2+( aq ) + 8 H2O( l )

Question 10

What is the E0 value for the Galvanic cell formed from these two half-reactions?

Accepted Answer

A)  − 2.31 V 
B)  +4.33 V 
C)  − 1.32 V 
D)  +2.00 V 
A)  − 2.31 V 
B)  +4.33 V 
C)  − 1.32 V 
D)  +2.00 V

Question 11

Secondary cells are designed to be rechargeable.

Accepted Answer

A) True 
 B)False

Question 12

The rusting witnessed in the sheet metal of a '65 Impala is an example of:

Accepted Answer

A)  uniform corrosion. 
B)  galvanic corrosion. 
C)  electrolysis. 
D)  compounding corrosion. 
A)  uniform corrosion. 
B)  galvanic corrosion. 
C)  electrolysis. 
D)  compounding corrosion.

Question 13

What is the oxidation number of Mn in MnO4 − ?

Accepted Answer

A)  1+ 
B)  2+ 
C)  7+ 
D)  8+ 
A)  1+ 
B)  2+ 
C)  7+ 
D)  8+

Question 14

The standard state of an electrochemical cell is measured as 1 atm pressure for all gases and 1.0 M for all aqueous solutions.

Accepted Answer

A) True 
 B)False

Question 15

Using the provided standard reduction potentials, which of the following cells is an example of a Galvanic cell?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO3 (aq) by 5.30 amps of electric current in 4.0 hours?

Accepted Answer

A)  85.3 g 
B)  42.6 g 
C)  121 g 
D)  188 g 
A)  85.3 g 
B)  42.6 g 
C)  121 g 
D)  188 g

Question 17

A Galvanic cell is an electrochemical cell in which a spontaneous chemical reaction may be used to generate an electrical current.

Accepted Answer

A) True 
 B)False

Question 18

Reduction occurs at the anode of a Galvanic cell.

Accepted Answer

A) True 
 B)False

Question 19

Given a Galvanic cell:   , the right-hand side of this notation represents the:

Accepted Answer

A)  spontaneous half of the reaction. 
B)  oxidation 1/2 reaction. 
C)  anode of the cell. 
D)  reduction 1/2 reaction. 
A)  spontaneous half of the reaction. 
B)  oxidation 1/2 reaction. 
C)  anode of the cell. 
D)  reduction 1/2 reaction.

Question 20

The standard hydrogen electrode (SHE) involves gaseous HCl at 1 atm being bubbled into water.

Accepted Answer

A) True 
 B)False

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

In the decomposition of hydrogen peroxide, which atom is being reduced? H₂O₂( aq ) → H₂( g ) + O₂( g )

Galvanic corrosion may occur only when two different metals are in contact with one another.

In a redox reaction:

Which phrase best describes the half-reaction as written? Na⁺ + e⁻ → Na

What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

Species with positive standard reduction potentials are excellent candidates for reduction reactions.

Balance the following electrochemical reaction in acid: MnO₄⁻( aq ) + Zr( s ) ↔ Mn²⁺( aq ) + Zr²⁺( aq )

What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

Secondary cells are designed to be rechargeable.

The rusting witnessed in the sheet metal of a '65 Impala is an example of:

What is the oxidation number of Mn in MnO₄⁻?

The standard state of an electrochemical cell is measured as 1 atm pressure for all gases and 1.0 M for all aqueous solutions.

Using the provided standard reduction potentials, which of the following cells is an example of a Galvanic cell?

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO₃ (aq) by 5.30 amps of electric current in 4.0 hours?

A Galvanic cell is an electrochemical cell in which a spontaneous chemical reaction may be used to generate an electrical current.

Reduction occurs at the anode of a Galvanic cell.

Given a Galvanic cell: , the right-hand side of this notation represents the:

The standard hydrogen electrode (SHE) involves gaseous HCl at 1 atm being bubbled into water.

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Exam 13: Electrochemistry

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O2( g ) → FeO( s )

In the decomposition of hydrogen peroxide, which atom is being reduced? H2O2( aq ) → H2( g ) + O2( g )

Galvanic corrosion may occur only when two different metals are in contact with one another.

In a redox reaction:

Which phrase best describes the half-reaction as written? Na+ + e − → Na

What is the E0 value for the Galvanic cell formed from these two half-reactions?

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O2( g ) → FeO( s )

Species with positive standard reduction potentials are excellent candidates for reduction reactions.

Balance the following electrochemical reaction in acid: MnO4 − ( aq ) + Zr( s ) ↔ Mn2+( aq ) + Zr2+( aq )

What is the E0 value for the Galvanic cell formed from these two half-reactions?

Secondary cells are designed to be rechargeable.

The rusting witnessed in the sheet metal of a '65 Impala is an example of:

What is the oxidation number of Mn in MnO4 − ?

The standard state of an electrochemical cell is measured as 1 atm pressure for all gases and 1.0 M for all aqueous solutions.

Using the provided standard reduction potentials, which of the following cells is an example of a Galvanic cell?

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO3 (aq) by 5.30 amps of electric current in 4.0 hours?

A Galvanic cell is an electrochemical cell in which a spontaneous chemical reaction may be used to generate an electrical current.

Reduction occurs at the anode of a Galvanic cell.

Given a Galvanic cell: , the right-hand side of this notation represents the:

The standard hydrogen electrode (SHE) involves gaseous HCl at 1 atm being bubbled into water.

Introduction to Chemistry

Atoms and Molecules

Molecules Moles Chemical Equations

Stoichiometry

Gases

The Periodic Table and Atomic Structure

Chemical Bonding and Molecular Structure

Molecules and Materials

Energy and Chemistry

Entropy and the Second Law of Thermodynamics

Chemical Kinetics

Chemical Equilibrium

Filters

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

In the decomposition of hydrogen peroxide, which atom is being reduced? H₂O₂( aq ) → H₂( g ) + O₂( g )

Which phrase best describes the half-reaction as written? Na⁺ + e⁻ → Na

What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

Balance the following electrochemical reaction in acid: MnO₄⁻( aq ) + Zr( s ) ↔ Mn²⁺( aq ) + Zr²⁺( aq )

What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

What is the oxidation number of Mn in MnO₄⁻?

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO₃ (aq) by 5.30 amps of electric current in 4.0 hours?