Question 1

Which statement is FALSE?

Accepted Answer

A)   Silver ion (Ag+) to silver atom is reduction.
B)   Chloride (Cl-) ion to chlorine atom is reduction.
C)   Hydrogen atom to hydride ion (H-) is reduction.
D)   Sulfur atom to sulfide ion (S2-) is reduction.E) None of the above
F) All of the above

Question 2

Which example BEST represents the reaction between copper and hydrochloric acid?

Accepted Answer

A)   Cu + 2 HCl  →\rightarrow→  CuCl2 + H2
B)   Cu + 2 HCl  →\rightarrow→   CuH2 + Cl2
C)   Cu + H2Cl  →\rightarrow→   CuCl + H2
D)   Copper and hydrochloric acid do not react. E) B) and D)
F) A) and D)

Question 3

If the accompanying drawing of an electrochemical cell represents an iron-nickel cell,use the partial activity series included to identify the components labeled 1,2,3,and 4 respectively. 2+ + 2e- Fe  \rightarrow  Fe2+ + 2e- Co  \rightarrow Co2+ + 2e- Ni  \rightarrow Ni2+ + 2e- Cu  \rightarrow  Cu2+ + 2e- A)  iron,nickel,iron ion solution,nickel ion solution B)  nickel,iron,iron ion solution,nickel ion solution C)  nickel,iron,nickel ion solution,iron ion solution D)  iron,nickel,nickel ion solution,iron ion solution " class="answers-bank-image d-inline" rel="preload" > Zn  →\rightarrow→  Zn2+ + 2e- Fe  →\rightarrow→  Fe2+ + 2e-
Co  →\rightarrow→ Co2+ + 2e-
Ni  →\rightarrow→ Ni2+ + 2e-
Cu  →\rightarrow→  Cu2+ + 2e-

Accepted Answer

A)   iron,nickel,iron ion solution,nickel ion solution
B)   nickel,iron,iron ion solution,nickel ion solution
C)   nickel,iron,nickel ion solution,iron ion solution
D)   iron,nickel,nickel ion solution,iron ion solution E) A) and C)
F) A) and B)

Question 4

Use the partial activity series included to determine which reaction will NOT occur spontaneously. Zn  →\rightarrow→  Zn2+ + 2e-
Fe →\rightarrow→  Fe2+ + 2e-
Co  →\rightarrow→  Co2+ + 2e-
Ni  →\rightarrow→  Ni2+ + 2e-
Cu  →\rightarrow→  Cu2+ + 2e-

Accepted Answer

A)   Fe (s) + Co2+ (aq)  →\rightarrow→ Fe2+ (aq) + Co (s) 
B)   Zn (s) + Ni2+ (aq)  →\rightarrow→ Zn2+ (aq) + Ni (s) 
C)   Co (s) + Fe2+ (aq)  →\rightarrow→ Co2+ (aq) + Fe (s) 
D)   Ni (s) + Cu2+ (aq)  →\rightarrow→  Ni2+ (aq) + Cu (s)  E) C) and D)
F) A) and D)

Question 5

What is the oxidation number of sulfur in the thiosulfate ion,S2O32-?

Accepted Answer

A)   -2
B)   +2
C)   +6
D)   +4E) B) and D)
F) None of the above

Question 6

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Mg  →\rightarrow→ Mg2+ + 2 e-
Pb4+ + 4 e-  →\rightarrow→  Pb

Accepted Answer

A)   Pb (s) + Mg2+ (aq)  →\rightarrow→ Pb4+ (aq) + Mg (s) 
B)   Mg (s) + Pb4+ (aq)  →\rightarrow→  Pb (s) + Mg2+ (aq) 
C)   2 Mg (s) + Pb4+ (aq)  →\rightarrow→  Pb (s) + 2 Mg2+ (aq) 
D)   Pb (s) + 2 Mg2+ (aq)  →\rightarrow→ Pb4+ (aq) + 2 Mg (s)  E) A) and B)
F) C) and D)

Question 7

Given the accompanying partial activity series,which element(s) will react with acid? Zn  →\rightarrow→  Zn2+ + 2e-
Fe  →\rightarrow→   Fe2+ + 2e-
Ni  →\rightarrow→  Ni2+ + 2e-
H2  →\rightarrow→   2H+ + 2e-
Cu →\rightarrow→   Cu2+ + 2e-
Ag  →\rightarrow→   Ag+ + e-

Accepted Answer

A)   nickel
B)   copper
C)   silver
D)   nickel,copper,and silver
E)   None of these elements will react with acid. F) A) and E)
G) A) and D)

Question 8

Which example represents the reduction half-reaction for cobalt/cobalt(II) ?

Accepted Answer

A)   Co  →\rightarrow→  Co2+ + 2 e-
B)   Co + 2 e- →\rightarrow→  Co2-
C)   Co2+ + 2 e-  →\rightarrow→ Co
D)   Co2+  →\rightarrow→ Co + 2 e- E) All of the above
F) C) and D)

Question 9

Which example illustrates a redox reaction?

Accepted Answer

A)   metal and nonmetal
B)   double displacement
C)   neutralization
D)   precipitationE) A) and B)
F) B) and C)

Question 10

Given the following net ionic equation,select the CORRECT pairing of half-reactions. 2 Al (s) + 3 Pb2+ (aq)  →\rightarrow→  2 Al3+ (aq) + 3 Pb (s)

Accepted Answer

A)   reduction: Al  →\rightarrow→  Al3+ + 3 e-; oxidation: Pb2+ + 2 e-  →\rightarrow→  Pb
B)   reduction: Pb2+ + 2 e-  →\rightarrow→  Pb; oxidation: Al  →\rightarrow→ Al3+ + 3 e-
C)   reduction: Al3+ + 3 e-  →\rightarrow→  Al; oxidation: Pb2+ + 2 e- →\rightarrow→ Pb
D)   reduction: Pb  →\rightarrow→  Pb2+ + 2 e-; oxidation: Al  →\rightarrow→ Al3+ + 3 e- E) None of the above
F) A) and D)

Question 11

What is the oxidation number of carbon in carbon dioxide,CO2?

Accepted Answer

A)   -2
B)   +2
C)   +6
D)   +4E) All of the above
F) A) and C)

Question 12

Consider an electrochemical cell consisting of zinc and cobalt half-cells.Use the partial activity series included to determine the direction in which the electrons in the wire will flow. Zn  →\rightarrow→  Zn2+ + 2e-
Fe  →\rightarrow→  Fe2+ + 2e-
Co  →\rightarrow→ Co2+ + 2e-
Ni  →\rightarrow→  Ni2+ + 2e-
Cu  →\rightarrow→  Cu2+ + 2e-

Accepted Answer

A)   from the zinc anode to the cobalt cathode
B)   from the zinc cathode to the cobalt anode
C)   from the cobalt anode to the zinc cathode
D)   from the cobalt cathode to the zinc anode E) C) and D)
F) A) and B)

Exam 14: Oxidation-Reduction Reactions

What is the oxidation number of sulfur in the thiosulfate ion,S₂O₃²^-?

Correct Answer
verified

Which example BEST represents the reaction between copper and hydrochloric acid?

Correct Answer
verified

Which statement is FALSE?

Correct Answer
verified

Correct Answer
verified

Which example represents the reduction half-reaction for cobalt/cobalt(II) ?

Correct Answer
verified

What is the oxidation number of carbon in carbon dioxide,CO₂?

Correct Answer
verified

Given the accompanying partial activity series,which element(s) will react with acid? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- H₂ $\rightarrow$ 2H⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^- Ag $\rightarrow$ Ag⁺ + e^-

Correct Answer
verified

Correct Answer
verified

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Mg $\rightarrow$ Mg²⁺ + 2 e^- Pb⁴⁺ + 4 e^- $\rightarrow$ Pb

Correct Answer
verified

Which example illustrates a redox reaction?

Correct Answer
verified

Use the partial activity series included to determine which reaction will NOT occur spontaneously. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Correct Answer
verified

Given the following net ionic equation,select the CORRECT pairing of half-reactions. 2 Al (s) + 3 Pb²⁺ (aq) $\rightarrow$ 2 Al³⁺ (aq) + 3 Pb (s)

Correct Answer
verified

Exam 14: Oxidation-Reduction Reactions

What is the oxidation number of sulfur in the thiosulfate ion,S2O32-?

Correct AnswerverifiedShow Answer

Which example BEST represents the reaction between copper and hydrochloric acid?

Correct AnswerverifiedShow Answer

Which statement is FALSE?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which example represents the reduction half-reaction for cobalt/cobalt(II) ?

Correct AnswerverifiedShow Answer

What is the oxidation number of carbon in carbon dioxide,CO2?

Correct AnswerverifiedShow Answer

Given the accompanying partial activity series,which element(s) will react with acid? Zn →\rightarrow→ Zn2+ + 2e- Fe →\rightarrow→ Fe2+ + 2e- Ni →\rightarrow→ Ni2+ + 2e- H2 →\rightarrow→ 2H+ + 2e- Cu →\rightarrow→ Cu2+ + 2e- Ag →\rightarrow→ Ag+ + e-

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Mg →\rightarrow→ Mg2+ + 2 e- Pb4+ + 4 e- →\rightarrow→ Pb

Correct AnswerverifiedShow Answer

Which example illustrates a redox reaction?

Correct AnswerverifiedShow Answer

Use the partial activity series included to determine which reaction will NOT occur spontaneously. Zn →\rightarrow→ Zn2+ + 2e- Fe →\rightarrow→ Fe2+ + 2e- Co →\rightarrow→ Co2+ + 2e- Ni →\rightarrow→ Ni2+ + 2e- Cu →\rightarrow→ Cu2+ + 2e-

Correct AnswerverifiedShow Answer

Given the following net ionic equation,select the CORRECT pairing of half-reactions. 2 Al (s) + 3 Pb2+ (aq) →\rightarrow→ 2 Al3+ (aq) + 3 Pb (s)

Correct AnswerverifiedShow Answer

What is the oxidation number of sulfur in the thiosulfate ion,S₂O₃²^-?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the oxidation number of carbon in carbon dioxide,CO₂?

Correct Answer
verified

Given the accompanying partial activity series,which element(s) will react with acid? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- H₂ $\rightarrow$ 2H⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^- Ag $\rightarrow$ Ag⁺ + e^-

Correct Answer
verified

Correct Answer
verified

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Mg $\rightarrow$ Mg²⁺ + 2 e^- Pb⁴⁺ + 4 e^- $\rightarrow$ Pb

Correct Answer
verified

Correct Answer
verified

Use the partial activity series included to determine which reaction will NOT occur spontaneously. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

Correct Answer
verified

Given the following net ionic equation,select the CORRECT pairing of half-reactions. 2 Al (s) + 3 Pb²⁺ (aq) $\rightarrow$ 2 Al³⁺ (aq) + 3 Pb (s)

Correct Answer
verified