Question 1

The oxidation half-reaction for the reaction of zinc with hydrochloric acid is:

Accepted Answer

A)  Zn2+ + 2 e- $\rightarrow$Zn. 
B)  Zn $\rightarrow$ Zn2+ + 2 e-. 
C)  H2 $\rightarrow$ 2 H+ + 2 e-. 
D)  2 H+ + 2 e-$\rightarrow$H2. 
A)  Zn2+ + 2 e- $\rightarrow$Zn. 
B)  Zn $\rightarrow$ Zn2+ + 2 e-. 
C)  H2 $\rightarrow$ 2 H+ + 2 e-. 
D)  2 H+ + 2 e-$\rightarrow$H2. B

Question 2

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$Cu2+ + 2e-
Au3+ + 3e- $\rightarrow$ Au

Accepted Answer

A)  Cu (s)+ Au3+ (aq)$\rightarrow$Cu2+ (aq)+ Au (s) 
B)  3 Cu (s)+ 2 Au3+ (aq)$\rightarrow$3 Cu2+ (aq)+ 2 Au (s) 
C)  2 Au (s)+ 3 Cu2+ (aq)$\rightarrow$ 2 Au3+ (aq)+ 3 Cu (s) 
D)  Au (s)+ Cu2+ (aq)$\rightarrow$Au3+ (aq)+ Cu (s) 
A)  Cu (s)+ Au3+ (aq)$\rightarrow$Cu2+ (aq)+ Au (s) 
B)  3 Cu (s)+ 2 Au3+ (aq)$\rightarrow$3 Cu2+ (aq)+ 2 Au (s) 
C)  2 Au (s)+ 3 Cu2+ (aq)$\rightarrow$ 2 Au3+ (aq)+ 3 Cu (s) 
D)  Au (s)+ Cu2+ (aq)$\rightarrow$Au3+ (aq)+ Cu (s) B

Question 3

Given the accompanying partial activity series,which element(s)will NOT 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)  iron 
C)  silver 
D)  nickel,iron,and silver 
E)  All of these elements will react with acid. 
A)  nickel 
B)  iron 
C)  silver 
D)  nickel,iron,and silver 
E)  All of these elements will react with acid. C

Question 4

Which pair of half-reactions could be used to electroplate silver onto iron?

Accepted Answer

A)  reduction: Ag+ + e- $\rightarrow$Ag; oxidation: Ag $\rightarrow$Ag+ + e- 
B)  reduction: Ag $\rightarrow$Ag+ + e-; oxidation: Ag+ + e- $\rightarrow$Ag 
C)  reduction: Fe2+ + 2 e- $\rightarrow$Fe; oxidation: Fe $\rightarrow$Fe2+ + 2 e- 
D)  reduction: Fe $\rightarrow$Fe2+ + 2 e-; oxidation: Fe2+ + 2 e- $\rightarrow$Fe 
A)  reduction: Ag+ + e- $\rightarrow$Ag; oxidation: Ag $\rightarrow$Ag+ + e- 
B)  reduction: Ag $\rightarrow$Ag+ + e-; oxidation: Ag+ + e- $\rightarrow$Ag 
C)  reduction: Fe2+ + 2 e- $\rightarrow$Fe; oxidation: Fe $\rightarrow$Fe2+ + 2 e- 
D)  reduction: Fe $\rightarrow$Fe2+ + 2 e-; oxidation: Fe2+ + 2 e- $\rightarrow$Fe

Question 5

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

Question 6

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

Accepted Answer

A)  Mg + 2 HCl $\rightarrow$ MgCl2 + H2 
B)  Mg + 2 HCl $\rightarrow$ MgH2 + Cl2 
C)  Mg + H2Cl $\rightarrow$  MgCl + H2 
D)  Magnesium and hydrochloric acid do not react. 
A)  Mg + 2 HCl $\rightarrow$ MgCl2 + H2 
B)  Mg + 2 HCl $\rightarrow$ MgH2 + Cl2 
C)  Mg + H2Cl $\rightarrow$  MgCl + H2 
D)  Magnesium and hydrochloric acid do not react.

Question 7

If the accompanying drawing of an electrochemical cell represents an iron-nickel cell,use the partial activity series included to select the half-reaction represented by the LEFT side of the cell.   Zn $\rightarrow$ Zn2+ + 2e- Fe $\rightarrow$Fe2+ + 2e-
Co $\rightarrow$Co2+ + 2e-
Ni $\rightarrow$ Ni2+ + 2e-
Cu $\rightarrow$ Cu2+ + 2e-

Accepted Answer

A)  Fe$\rightarrow$ Fe2+ + 2e- 
B)  Ni $\rightarrow$ Ni2+ + 2e- 
C)  Fe2+ + 2e- $\rightarrow$Fe 
D)  Ni2+ + 2e- $\rightarrow$Ni 
A)  Fe$\rightarrow$ Fe2+ + 2e- 
B)  Ni $\rightarrow$ Ni2+ + 2e- 
C)  Fe2+ + 2e- $\rightarrow$Fe 
D)  Ni2+ + 2e- $\rightarrow$Ni

Question 8

Knowing that sodium and potassium react violently with water,predict which element will also react with water.

Accepted Answer

A)  cesium 
B)  aluminum 
C)  zinc 
D)  It is impossible to predict accurately from the information given. 
A)  cesium 
B)  aluminum 
C)  zinc 
D)  It is impossible to predict accurately from the information given.

Question 9

Which example does NOT illustrate a redox reaction?

Accepted Answer

A)  metal and nonmetal 
B)  double displacement 
C)  single displacement 
D)  combustion 
A)  metal and nonmetal 
B)  double displacement 
C)  single displacement 
D)  combustion

Question 10

Which reaction could be used to electroplate nickel with gold?

Accepted Answer

A)  Ni (s)+ 2 Au+ (aq)$\rightarrow$Ni2+ (aq)+ 2 Au (s) 
B)  Zn (s)+ 2 Au+ (aq)$\rightarrow$Zn2+ (aq)+ 2 Au (s) 
C)  2 Au (s)+ Ni2+ (aq)$\rightarrow$ Ni (s)+ 2 Au+ (aq) 
D)  2 Au (s)+ Zn2+ (aq)$\rightarrow$ Zn (s)+ 2 Au+ (aq) 
A)  Ni (s)+ 2 Au+ (aq)$\rightarrow$Ni2+ (aq)+ 2 Au (s) 
B)  Zn (s)+ 2 Au+ (aq)$\rightarrow$Zn2+ (aq)+ 2 Au (s) 
C)  2 Au (s)+ Ni2+ (aq)$\rightarrow$ Ni (s)+ 2 Au+ (aq) 
D)  2 Au (s)+ Zn2+ (aq)$\rightarrow$ Zn (s)+ 2 Au+ (aq)

Question 11

If the accompanying drawing of an electrochemical cell represents an iron-nickel cell,use the partial activity series included to determine the component labeled 1.   Zn $\rightarrow$ Zn2+ + 2e- Fe $\rightarrow$ Fe2+ + 2e-
Co$\rightarrow$Co2+ + 2e-
Ni $\rightarrow$Ni2+ + 2e-
Cu $\rightarrow$ Cu2+ + 2e-

Accepted Answer

A)  iron anode 
B)  nickel anode 
C)  iron cathode 
D)  nickel cathode 
A)  iron anode 
B)  nickel anode 
C)  iron cathode 
D)  nickel cathode

Question 12

The major credit for creating the first "battery" goes to:

Accepted Answer

A)  James Watt. 
B)  Andre Ampere. 
C)  Alessandro Volta. 
D)  Georg Ohm. 
A)  James Watt. 
B)  Andre Ampere. 
C)  Alessandro Volta. 
D)  Georg Ohm.

Question 13

What is the oxidation number of carbon in carbon monoxide,CO?

Accepted Answer

A)  -2 
B)  +2 
C)  +6 
D)  +4 
A)  -2 
B)  +2 
C)  +6 
D)  +4

Question 14

Given the accompanying partial activity series,which element CANNOT reduce nickel(II)to elemental nickel? Zn $\rightarrow$ Zn2+ + 2e-
Fe $\rightarrow$ Fe2+ + 2e-
Co $\rightarrow$ Co2+ + 2e-
Ni $\rightarrow$  Ni2+ + 2e-
Cu $\rightarrow$  Cu2+ + 2e-

Accepted Answer

A)  zinc 
B)  iron 
C)  cobalt 
D)  copper 
A)  zinc 
B)  iron 
C)  cobalt 
D)  copper

Question 15

What are the coefficients of the balanced equation that represents the reaction in a magnesium/iron electrochemical cell? Mg (s)+ Fe2+ (aq)$\rightarrow$ Fe (s)+ Mg2+ (aq)

Accepted Answer

A)  1,1,1,1 
B)  1,2,2,1 
C)  2,1,1,2 
D)  1,2,1,2 
A)  1,1,1,1 
B)  1,2,2,1 
C)  2,1,1,2 
D)  1,2,1,2

Question 16

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$ Cu2+ + 2 e-
Ag+ + e- $\rightarrow$Ag

Accepted Answer

A)  Cu (s)+ Ag+ (aq)$\rightarrow$Cu2+ (aq)+ Ag (s) 
B)  Cu (s)+ 2 Ag+ (aq)$\rightarrow$Cu2+ (aq)+ 2 Ag (s) 
C)  Ag (s)+ Cu2+ (aq)$\rightarrow$Ag+ (aq)+ Cu (s) 
D)  2 Ag (s)+ Cu2+ (aq)$\rightarrow$ 2 Ag+ (aq)+ Cu (s) 
A)  Cu (s)+ Ag+ (aq)$\rightarrow$Cu2+ (aq)+ Ag (s) 
B)  Cu (s)+ 2 Ag+ (aq)$\rightarrow$Cu2+ (aq)+ 2 Ag (s) 
C)  Ag (s)+ Cu2+ (aq)$\rightarrow$Ag+ (aq)+ Cu (s) 
D)  2 Ag (s)+ Cu2+ (aq)$\rightarrow$ 2 Ag+ (aq)+ Cu (s)

Question 17

In the context of chemical reactions,oxidation refers to the:

Accepted Answer

A)  gain of electrons. 
B)  loss of electrons. 
C)  loss of oxygen. 
D)  loss of water. 
A)  gain of electrons. 
B)  loss of electrons. 
C)  loss of oxygen. 
D)  loss of water.

Question 18

Given the accompanying partial activity series,predict which element or ion will react with cobalt,Co. Zn $\rightarrow$ Zn2+ + 2e-
Fe $\rightarrow$  Fe2+ + 2e-
Co$\rightarrow$  Co2+ + 2e-
Ni $\rightarrow$  Ni2+ + 2e-
Cu $\rightarrow$  Cu2+ + 2e-

Accepted Answer

A)  Zn 
B)  Fe2+ 
C)  Ni 
D)  Cu2+ 
A)  Zn 
B)  Fe2+ 
C)  Ni 
D)  Cu2+

Question 19

What is the oxidation number of sulfur in the sulfite ion,SO32-?

Accepted Answer

A)  -2 
B)  +2 
C)  +6 
D)  +4 
A)  -2 
B)  +2 
C)  +6 
D)  +4

Question 20

In the context of chemical reactions,reduction refers to the:

Accepted Answer

A)  gain of electrons. 
B)  loss of electrons. 
C)  gain of oxygen. 
D)  loss of water. 
A)  gain of electrons. 
B)  loss of electrons. 
C)  gain of oxygen. 
D)  loss of water.

The oxidation half-reaction for the reaction of zinc with hydrochloric acid is:

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$ Cu²⁺ + 2e^- Au³⁺ + 3e^- $\rightarrow$ Au

Given the accompanying partial activity series,which element(s)will NOT 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^-

Which pair of half-reactions could be used to electroplate silver onto iron?

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^-

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

Knowing that sodium and potassium react violently with water,predict which element will also react with water.

Which example does NOT illustrate a redox reaction?

Which reaction could be used to electroplate nickel with gold?

The major credit for creating the first "battery" goes to:

What is the oxidation number of carbon in carbon monoxide,CO?

Given the accompanying partial activity series,which element CANNOT reduce nickel(II)to elemental nickel? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What are the coefficients of the balanced equation that represents the reaction in a magnesium/iron electrochemical cell? Mg (s)+ Fe²⁺ (aq) $\rightarrow$ Fe (s)+ Mg²⁺ (aq)

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$ Cu²⁺ + 2 e^- Ag⁺ + e^- $\rightarrow$ Ag

In the context of chemical reactions,oxidation refers to the:

Given the accompanying partial activity series,predict which element or ion will react with cobalt,Co. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What is the oxidation number of sulfur in the sulfite ion,SO₃²^-?

In the context of chemical reactions,reduction refers to the:

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

Exam 14: Oxidation-Reduction Reactions

The oxidation half-reaction for the reaction of zinc with hydrochloric acid is:

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu →\rightarrow→ Cu2+ + 2e- Au3+ + 3e- →\rightarrow→ Au

Given the accompanying partial activity series,which element(s)will NOT 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-

Which pair of half-reactions could be used to electroplate silver onto iron?

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-

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

Knowing that sodium and potassium react violently with water,predict which element will also react with water.

Which example does NOT illustrate a redox reaction?

Which reaction could be used to electroplate nickel with gold?

The major credit for creating the first "battery" goes to:

What is the oxidation number of carbon in carbon monoxide,CO?

Given the accompanying partial activity series,which element CANNOT reduce nickel(II)to elemental nickel? Zn →\rightarrow→ Zn2+ + 2e- Fe →\rightarrow→ Fe2+ + 2e- Co →\rightarrow→ Co2+ + 2e- Ni →\rightarrow→ Ni2+ + 2e- Cu →\rightarrow→ Cu2+ + 2e-

What are the coefficients of the balanced equation that represents the reaction in a magnesium/iron electrochemical cell? Mg (s)+ Fe2+ (aq) →\rightarrow→ Fe (s)+ Mg2+ (aq)

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu →\rightarrow→ Cu2+ + 2 e- Ag+ + e- →\rightarrow→ Ag

In the context of chemical reactions,oxidation refers to the:

Given the accompanying partial activity series,predict which element or ion will react with cobalt,Co. Zn →\rightarrow→ Zn2+ + 2e- Fe →\rightarrow→ Fe2+ + 2e- Co →\rightarrow→ Co2+ + 2e- Ni →\rightarrow→ Ni2+ + 2e- Cu →\rightarrow→ Cu2+ + 2e-

What is the oxidation number of sulfur in the sulfite ion,SO32-?

In the context of chemical reactions,reduction refers to the:

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$ Cu²⁺ + 2e^- Au³⁺ + 3e^- $\rightarrow$ Au

Given the accompanying partial activity series,which element(s)will NOT 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^-

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^-

Given the accompanying partial activity series,which element CANNOT reduce nickel(II)to elemental nickel? Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What are the coefficients of the balanced equation that represents the reaction in a magnesium/iron electrochemical cell? Mg (s)+ Fe²⁺ (aq) $\rightarrow$ Fe (s)+ Mg²⁺ (aq)

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu $\rightarrow$ Cu²⁺ + 2 e^- Ag⁺ + e^- $\rightarrow$ Ag

Given the accompanying partial activity series,predict which element or ion will react with cobalt,Co. Zn $\rightarrow$ Zn²⁺ + 2e^- Fe $\rightarrow$ Fe²⁺ + 2e^- Co $\rightarrow$ Co²⁺ + 2e^- Ni $\rightarrow$ Ni²⁺ + 2e^- Cu $\rightarrow$ Cu²⁺ + 2e^-

What is the oxidation number of sulfur in the sulfite ion,SO₃²^-?