Question 1

What is the oxidation state of the underlined atom in the reaction:

Accepted Answer

A) 0 
B) +2 
C) -2 
D) +4 
E) -4 
A) 0 
B) +2 
C) -2 
D) +4 
E) -4

Question 2

Balance the following half reaction in base solution: H20 (l)→ H2 (g)

Accepted Answer

A) 2H2O (l)+ 2 e- → H2 (g)+ 2 OH- (aq) 
B) 2H2O (l)→ 2H2 (g)+ 2 e- + O2 
C) 2H2O (l)→ H2 (g)+ 2 H+ + 2e- 
D) H2O (l)→ 2H+ + 2OH- 
E) 2H2O (l)→ H2 (g)+ 2OH- (aq)+ 5 e- 
A) 2H2O (l)+ 2 e- → H2 (g)+ 2 OH- (aq) 
B) 2H2O (l)→ 2H2 (g)+ 2 e- + O2 
C) 2H2O (l)→ H2 (g)+ 2 H+ + 2e- 
D) H2O (l)→ 2H+ + 2OH- 
E) 2H2O (l)→ H2 (g)+ 2OH- (aq)+ 5 e-

Question 3

Most acids dissolve metals by the oxidation of H+ ions to hydrogen gas.

Accepted Answer

A) True 
 B)False

Question 4

Oxidation and reduction cannot both occur in the same chemical reaction.

Accepted Answer

A) True 
 B)False

Question 5

Identify the oxidizing agent in the following reaction:  
.

Accepted Answer

A) C   
B)    
C) C   
D)   
O 
E) none of the above 
A) C   
B)    
C) C   
D)   
O 
E) none of the above

Question 6

The oxidation number of sulfur in S   
is -6.

Accepted Answer

A) True 
 B)False

Question 7

Corrosion of metals may be prevented by keeping them dry at all times.

Accepted Answer

A) True 
 B)False

Question 8

Oxidation typically involves:

Accepted Answer

A) the loss of electrons. 
B) the loss of oxygen. 
C) the gain of electrons. 
D) the gain of water. 
E) none of the above 
A) the loss of electrons. 
B) the loss of oxygen. 
C) the gain of electrons. 
D) the gain of water. 
E) none of the above

Question 9

What must be done to the following half-reactions before they can be added together?
Mn (s)→ Mn 2+(aq)+ 2e-
Fe 3+ (aq)+ 3 e- → Fe (s)

Accepted Answer

A) Double the Mn half-reaction. 
B) Double the Mn half-reaction and triple the Fe half-reaction. 
C) Triple the Mn half-reaction and double the Fe half-reaction. 
D) Add H+ ions to the left-side of the Mn reaction. 
E) none of the above 
A) Double the Mn half-reaction. 
B) Double the Mn half-reaction and triple the Fe half-reaction. 
C) Triple the Mn half-reaction and double the Fe half-reaction. 
D) Add H+ ions to the left-side of the Mn reaction. 
E) none of the above

Question 10

Corrosion can be prevented by all of the following EXCEPT:

Accepted Answer

A) painting. 
B) galvanizing. 
C) sacrificial anode. 
D) sacrificial cathode. 
E) none of the above 
A) painting. 
B) galvanizing. 
C) sacrificial anode. 
D) sacrificial cathode. 
E) none of the above

Question 11

How many electrons are exchanged when the following reaction is balanced?
Zn (s)+ Ni 3+ (aq)→ Zn 2+ (aq)+ Ni (s)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 6 
E) none of the above 
A) 1 
B) 2 
C) 3 
D) 6 
E) none of the above

Question 12

Assign the oxidation state of each atom in sodium sulfate,Na2SO4.

Accepted Answer

A) Na = +1,S = +4,O = -2 
B) Na = +1,S = -2,O = +4 
C) Na = +2,S = +6,O = -2 
D) Na = +1,S = +6,O = -2 
E) Na = +2,S = -2,O = 0 
A) Na = +1,S = +4,O = -2 
B) Na = +1,S = -2,O = +4 
C) Na = +2,S = +6,O = -2 
D) Na = +1,S = +6,O = -2 
E) Na = +2,S = -2,O = 0

Question 13

Using the activity list included in this problem,which element/ion is the most resistant to reduction?
Activity Series =

Accepted Answer

A)    
B) Pb 
C)    
D)    
E) none of the above 
A)    
B) Pb 
C)    
D)    
E) none of the above

Question 14

From the activity list included in this problem,which element will react with Cu?
Activity Series =

Accepted Answer

A) Sn 
B) Pb 
C)    
D) Cu 
E) none of the above 
A) Sn 
B) Pb 
C)    
D) Cu 
E) none of the above

Question 15

Balance the redox reaction in acid solution:

Accepted Answer

A)   
+ O 2- (aq) 
B)   
+ H2O (l) 
C)   
+ H2O (l) 
D)   
+ OH- (aq) 
E) none of the above 
A)   
+ O 2- (aq) 
B)   
+ H2O (l) 
C)   
+ H2O (l) 
D)   
+ OH- (aq) 
E) none of the above

Question 16

What is the oxidation state of the underlined atom in the reaction:

Accepted Answer

A) 0 
B) +1 
C) -1 
D) +2 
E) -2 
A) 0 
B) +1 
C) -1 
D) +2 
E) -2

Question 17

From the activity list included in this problem,which element will not dissolve in dilute hydrochloric acid?
Activity Series =

Accepted Answer

A) Sn 
B) Pb 
C)    
D) Cu 
E) none of the above 
A) Sn 
B) Pb 
C)    
D) Cu 
E) none of the above

Question 18

The oxidation state of Mn in KMnO4 is:

Accepted Answer

A) +1 
B) -1 
C) +5 
D) +7 
E) none of the above 
A) +1 
B) -1 
C) +5 
D) +7 
E) none of the above

Question 19

From the activity list included in this problem,which element/ion is the most easily oxidized?
Activity Series =

Accepted Answer

A) Na 
B) Ca 
C)    
D) Li 
E)    
A) Na 
B) Ca 
C)    
D) Li 
E)

Question 20

Reduction is the gain of electrons.

Accepted Answer

A) True 
 B)False

What is the oxidation state of the underlined atom in the reaction:

Balance the following half reaction in base solution: H₂0 (l)→ H₂ (g)

Most acids dissolve metals by the oxidation of H⁺ ions to hydrogen gas.

Oxidation and reduction cannot both occur in the same chemical reaction.

Identify the oxidizing agent in the following reaction: .

The oxidation number of sulfur in S is -6.

Corrosion of metals may be prevented by keeping them dry at all times.

Oxidation typically involves:

What must be done to the following half-reactions before they can be added together? Mn (s)→ Mn ²⁺(aq)+ 2e^- Fe ³⁺ (aq)+ 3 e^- → Fe (s)

Corrosion can be prevented by all of the following EXCEPT:

How many electrons are exchanged when the following reaction is balanced? Zn (s)+ Ni ³⁺ (aq)→ Zn ²⁺ (aq)+ Ni (s)

Assign the oxidation state of each atom in sodium sulfate,Na₂SO₄.

Using the activity list included in this problem,which element/ion is the most resistant to reduction? Activity Series =

From the activity list included in this problem,which element will react with Cu? Activity Series =

Balance the redox reaction in acid solution:

What is the oxidation state of the underlined atom in the reaction:

From the activity list included in this problem,which element will not dissolve in dilute hydrochloric acid? Activity Series =

The oxidation state of Mn in KMnO₄ is:

From the activity list included in this problem,which element/ion is the most easily oxidized? Activity Series =

Reduction is the gain of electrons.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids,solids,and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 16: Oxidation and Reduction

What is the oxidation state of the underlined atom in the reaction:

Balance the following half reaction in base solution: H20 (l)→ H2 (g)

Most acids dissolve metals by the oxidation of H+ ions to hydrogen gas.

Oxidation and reduction cannot both occur in the same chemical reaction.

Identify the oxidizing agent in the following reaction: .

The oxidation number of sulfur in S is -6.

Corrosion of metals may be prevented by keeping them dry at all times.

Oxidation typically involves:

What must be done to the following half-reactions before they can be added together? Mn (s)→ Mn 2+(aq)+ 2e- Fe 3+ (aq)+ 3 e- → Fe (s)

Corrosion can be prevented by all of the following EXCEPT:

How many electrons are exchanged when the following reaction is balanced? Zn (s)+ Ni 3+ (aq)→ Zn 2+ (aq)+ Ni (s)

Assign the oxidation state of each atom in sodium sulfate,Na2SO4.

Using the activity list included in this problem,which element/ion is the most resistant to reduction? Activity Series =

From the activity list included in this problem,which element will react with Cu? Activity Series =

Balance the redox reaction in acid solution:

What is the oxidation state of the underlined atom in the reaction:

From the activity list included in this problem,which element will not dissolve in dilute hydrochloric acid? Activity Series =

The oxidation state of Mn in KMnO4 is:

From the activity list included in this problem,which element/ion is the most easily oxidized? Activity Series =

Reduction is the gain of electrons.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids,solids,and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Balance the following half reaction in base solution: H₂0 (l)→ H₂ (g)

Most acids dissolve metals by the oxidation of H⁺ ions to hydrogen gas.

What must be done to the following half-reactions before they can be added together? Mn (s)→ Mn ²⁺(aq)+ 2e^- Fe ³⁺ (aq)+ 3 e^- → Fe (s)

How many electrons are exchanged when the following reaction is balanced? Zn (s)+ Ni ³⁺ (aq)→ Zn ²⁺ (aq)+ Ni (s)

Assign the oxidation state of each atom in sodium sulfate,Na₂SO₄.

The oxidation state of Mn in KMnO₄ is: