Question 1

The reaction, Al(s)+ HClO4(aq)$\rarr$ Al(ClO4)3(aq)+ H2(g), involves changes in oxidation numbers and is therefore classified as a redox reaction.

Accepted Answer

A) True 
 B)False

Question 2

A partial activity series is: Au 2 < Sn < Co < Fe < Mg. List all metals in this partial activity series that would NOT react with a solution of HCl.

Accepted Answer

Question 3

What is the oxidation number of sulfur in the compound, FeS2?

Accepted Answer

Question 4

When the carbohydrate, C12H22O11, undergoes complete combustion, which is an oxidation-reduction reaction, a specific set of products are formed. If you write the equation for the reaction and balance it, the sum of the coefficients for the reagents in the balanced equation will be: Hint: Complete combustion of a hydrocarbon in oxygen always yields carbon dioxide and water vapor.

Accepted Answer

A) 24 
B) 35 
C) 36 
D) 47 
E) 83 
A) 24 
B) 35 
C) 36 
D) 47 
E) 83

Question 5

When glucose, C6H12O6, undergoes complete combustion, the species that is reduced is

Accepted Answer

A) oxygen. 
B) glucose. 
C) hydrogen. 
D) carbon. 
E) carbon dioxide. 
A) oxygen. 
B) glucose. 
C) hydrogen. 
D) carbon. 
E) carbon dioxide.

Question 6

The NO molecule underwent oxidation during a chemical reaction. Which one of the species listed below is a possible product of the reaction?

Accepted Answer

A) N2H4  
B) NH3 
C) N2 
D) NO2- 
E) NH2OH 
A) N2H4  
B) NH3 
C) N2 
D) NO2- 
E) NH2OH

Question 7

Magnesium metal will displace hydrogen from nonoxidizing acids.

Accepted Answer

A) True 
 B)False

Question 8

The reaction, NiS(s)+ O2(g)$\rarr$ NiO(s)+ SO2(g), involves changes in oxidation number and is therefore classified as a redox reaction.

Accepted Answer

A) True 
 B)False

Question 9

The oxidation number of N in NO2- is ________.

Accepted Answer

Question 10

The oxidation of aluminum occurs slowly, due to the formation of which substance on the surface of the metal? Hint: Consider the reaction of aluminum and oxygen.

Accepted Answer

A) AlCl3(s) 
B) Al2(SO4)3(s) 
C) Al(NO3)3(s) 
D) Al2O3(s) 
E) Al(OH)3(s) 
A) AlCl3(s) 
B) Al2(SO4)3(s) 
C) Al(NO3)3(s) 
D) Al2O3(s) 
E) Al(OH)3(s)

Question 11

Oxidizing acids will react with more metals than nonoxidizing acids.

Accepted Answer

A) True 
 B)False

Question 12

When hydrocarbons undergo combustion, they form water and another product depending on the conditions. In the presence of excess oxygen, ________ is formed while in a somewhat limited supply of oxygen, ________ will form. If there is very limited amounts of oxygen, ________ will form.

Accepted Answer

CO₂, CO, an

Question 13

The oxidation number of N in HNO3 is

Accepted Answer

Question 14

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs This means that cadmium will displace aluminum from an aqueous solution of aluminum sulfate.

Accepted Answer

A) True 
 B)False

Question 15

When the equation, Zn(s)+ NO3-(aq)→ NH4+(aq)+ Zn2+(aq)is balanced for an acidic solution, the Zn/NO3- ratio is ________. Hint: Do not neglect to include electrons when balancing redox reactions.

Accepted Answer

Question 16

When the hydrocarbon, C8H16, undergoes complete combustion, which is an oxidation-reduction reaction, a specific set of products is formed. If you write the equation for the reaction and balance it, the sum of the coefficients for the reagents in the balanced equation will be: Hint: Complete combustion of a hydrocarbon in oxygen always yields carbon dioxide and water vapor.

Accepted Answer

A) 17 
B) 19 
C) 21 
D) 26 
E) 29 
A) 17 
B) 19 
C) 21 
D) 26 
E) 29

Question 17

The strength of a hydrogen peroxide, H2O2, solution can be determined by titration with permanganate solution. The reaction is:
2 MnO4-(aq)+ 5 H2O2(aq)+ 6 H+$\rarr$ 5O2(g)+ 2 Mn2+(aq)+ 8 H2O If it required 80.0 mL of 0.0220 molar MnO4-(aq)solution to titrate 5.0 mL of a H2O2(aq)solution, what is the molarity of the H2O2(aq)solution?

Accepted Answer

A) 0.14 M 
B) 0.18 M 
C) 0.35 M 
D) 0.62 M 
E) 0.88 M 
A) 0.14 M 
B) 0.18 M 
C) 0.35 M 
D) 0.62 M 
E) 0.88 M

Question 18

Which metal(s)can be used to reduce compounds of silver to silver metal?

Accepted Answer

A) Hg 
B) Au 
C) Ag 
D) Al 
E) Hg and Au 
A) Hg 
B) Au 
C) Ag 
D) Al 
E) Hg and Au

Question 19

What is the oxidation number of vanadium in (NH4)3VO4?

Accepted Answer

A) +2 
B) +3 
C) +5 
D) +6 
E) +7 
A) +2 
B) +3 
C) +5 
D) +6 
E) +7

Question 20

Complete the balancing of the following half-reaction, taking place in basic media. How many electrons are needed to balance the half-reaction? 
Br(aq)$\rarr$ BrO3(aq) Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.

Accepted Answer

A) 2 electrons, left side 
B) 2 electrons, right side 
C) 4 electrons, right side 
D) 6 electrons, right side 
E) 6 electrons, left side 
A) 2 electrons, left side 
B) 2 electrons, right side 
C) 4 electrons, right side 
D) 6 electrons, right side 
E) 6 electrons, left side

The reaction, Al(s)+ HClO₄(aq) $\rarr$ Al(ClO₄)₃(aq)+ H₂(g), involves changes in oxidation numbers and is therefore classified as a redox reaction.

A partial activity series is: Au < Pt < Ag < Cu < H₂ < Sn < Co < Fe < Mg. List all metals in this partial activity series that would NOT react with a solution of HCl.

What is the oxidation number of sulfur in the compound, FeS₂?

When glucose, C₆H₁₂O₆, undergoes complete combustion, the species that is reduced is

The NO molecule underwent oxidation during a chemical reaction. Which one of the species listed below is a possible product of the reaction?

Magnesium metal will displace hydrogen from nonoxidizing acids.

The reaction, NiS(s)+ O₂(g) $\rarr$ NiO(s)+ SO₂(g), involves changes in oxidation number and is therefore classified as a redox reaction.

The oxidation number of N in NO₂^- is ________.

The oxidation of aluminum occurs slowly, due to the formation of which substance on the surface of the metal? Hint: Consider the reaction of aluminum and oxygen.

Oxidizing acids will react with more metals than nonoxidizing acids.

When hydrocarbons undergo combustion, they form water and another product depending on the conditions. In the presence of excess oxygen, is formed while in a somewhat limited supply of oxygen, will form. If there is very limited amounts of oxygen, will form.

The oxidation number of N in HNO₃ is

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs This means that cadmium will displace aluminum from an aqueous solution of aluminum sulfate.

When the equation, Zn(s)+ NO₃^-(aq)→ NH₄⁺(aq)+ Zn²⁺(aq)is balanced for an acidic solution, the Zn/NO₃^- ratio is ________. Hint: Do not neglect to include electrons when balancing redox reactions.

Which metal(s)can be used to reduce compounds of silver to silver metal?

What is the oxidation number of vanadium in (NH₄)₃VO₄?

Complete the balancing of the following half-reaction, taking place in basic media. How many electrons are needed to balance the half-reaction? Br(aq) $\rarr$ BrO₃(aq) Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

Exam 6: Oxidation-Reduction Reactions

The reaction, Al(s)+ HClO4(aq) →\rarr→ Al(ClO4)3(aq)+ H2(g), involves changes in oxidation numbers and is therefore classified as a redox reaction.

A partial activity series is: Au < Pt < Ag < Cu < H2 < Sn < Co < Fe < Mg. List all metals in this partial activity series that would NOT react with a solution of HCl.

What is the oxidation number of sulfur in the compound, FeS2?

When glucose, C6H12O6, undergoes complete combustion, the species that is reduced is

The NO molecule underwent oxidation during a chemical reaction. Which one of the species listed below is a possible product of the reaction?

Magnesium metal will displace hydrogen from nonoxidizing acids.

The reaction, NiS(s)+ O2(g) →\rarr→ NiO(s)+ SO2(g), involves changes in oxidation number and is therefore classified as a redox reaction.

The oxidation number of N in NO2- is ________.

The oxidation of aluminum occurs slowly, due to the formation of which substance on the surface of the metal? Hint: Consider the reaction of aluminum and oxygen.

Oxidizing acids will react with more metals than nonoxidizing acids.

When hydrocarbons undergo combustion, they form water and another product depending on the conditions. In the presence of excess oxygen, ________ is formed while in a somewhat limited supply of oxygen, ________ will form. If there is very limited amounts of oxygen, ________ will form.

The oxidation number of N in HNO3 is

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs This means that cadmium will displace aluminum from an aqueous solution of aluminum sulfate.

When the equation, Zn(s)+ NO3-(aq)→ NH4+(aq)+ Zn2+(aq)is balanced for an acidic solution, the Zn/NO3- ratio is ________. Hint: Do not neglect to include electrons when balancing redox reactions.

Which metal(s)can be used to reduce compounds of silver to silver metal?

What is the oxidation number of vanadium in (NH4)3VO4?

Complete the balancing of the following half-reaction, taking place in basic media. How many electrons are needed to balance the half-reaction? Br(aq) →\rarr→ BrO3(aq) Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

The reaction, Al(s)+ HClO₄(aq) $\rarr$ Al(ClO₄)₃(aq)+ H₂(g), involves changes in oxidation numbers and is therefore classified as a redox reaction.

A partial activity series is: Au < Pt < Ag < Cu < H₂ < Sn < Co < Fe < Mg. List all metals in this partial activity series that would NOT react with a solution of HCl.

What is the oxidation number of sulfur in the compound, FeS₂?

When glucose, C₆H₁₂O₆, undergoes complete combustion, the species that is reduced is

The reaction, NiS(s)+ O₂(g) $\rarr$ NiO(s)+ SO₂(g), involves changes in oxidation number and is therefore classified as a redox reaction.

The oxidation number of N in NO₂^- is ________.

When hydrocarbons undergo combustion, they form water and another product depending on the conditions. In the presence of excess oxygen, is formed while in a somewhat limited supply of oxygen, will form. If there is very limited amounts of oxygen, will form.

The oxidation number of N in HNO₃ is

When the equation, Zn(s)+ NO₃^-(aq)→ NH₄⁺(aq)+ Zn²⁺(aq)is balanced for an acidic solution, the Zn/NO₃^- ratio is ________. Hint: Do not neglect to include electrons when balancing redox reactions.

What is the oxidation number of vanadium in (NH₄)₃VO₄?

Complete the balancing of the following half-reaction, taking place in basic media. How many electrons are needed to balance the half-reaction? Br(aq) $\rarr$ BrO₃(aq) Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.