Question 1

Which one of the following is not a redox reaction?

Accepted Answer

A)  2H2O2(aq) F1F1F1S1F1F1F10 2H2O(l) + O2(g) 
B)  N2(g) + 3H2(g) F1F1F1S1F1F1F10 2NH3(g) 
C)  BaCl2(aq) + K2CrO4(aq) F1F1F1S1F1F1F10 BaCrO4(aq) + 2KCl(aq) 
D)  2Al(s) + Fe2O3(s) F1F1F1S1F1F1F10 Al2O3(s) + 2Fe(s) 
E)  2H2O(g) F1F1F1S1F1F1F10 2H2(g) + O2(g) 
A)  2H2O2(aq) F1F1F1S1F1F1F10 2H2O(l) + O2(g) 
B)  N2(g) + 3H2(g) F1F1F1S1F1F1F10 2NH3(g) 
C)  BaCl2(aq) + K2CrO4(aq) F1F1F1S1F1F1F10 BaCrO4(aq) + 2KCl(aq) 
D)  2Al(s) + Fe2O3(s) F1F1F1S1F1F1F10 Al2O3(s) + 2Fe(s) 
E)  2H2O(g) F1F1F1S1F1F1F10 2H2(g) + O2(g)

Question 2

Select the classification for the following reaction. Fe2+(aq) + 2OH-(aq) F1F1F1S1F1F1F10 Fe(OH)2(s)

Accepted Answer

A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  none of the above 
A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  none of the above

Question 3

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl2(l)   ?

Accepted Answer

A)  CaCl2(l)   Ca(l) + 2Cl-(l) 
B)  CaCl2(l)   Ca2+(l) + Cl2(g) 
C)  CaCl2(l)   Ca2+(l) + 2Cl-(l) 
D)  CaCl2(l)   Ca(l) + Cl2(g) 
E)  CaCl2(l)   CaCl(l) + Cl-(l) 
A)  CaCl2(l)   Ca(l) + 2Cl-(l) 
B)  CaCl2(l)   Ca2+(l) + Cl2(g) 
C)  CaCl2(l)   Ca2+(l) + 2Cl-(l) 
D)  CaCl2(l)   Ca(l) + Cl2(g) 
E)  CaCl2(l)   CaCl(l) + Cl-(l)

Question 4

Select the classification for the following reaction. H2CO3(aq) F1F1F1S1F1F1F10 H2O(l) + CO2(g)

Accepted Answer

A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  none of the above 
A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  none of the above

Question 5

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Accepted Answer

A) True 
 B)False

Question 6

Write down the oxidation number of the indicated atom in each of the following formulas:
a. Si in SiO2
b. Cl in ClO2-
c. Mn in KMnO4
d. C in C6H12O6

Accepted Answer

a. +4
b. +

Question 7

How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Accepted Answer

A)  0.60 mol 
B)  0.75 mol 
C)  0.94 mol 
D)  1.7 mol 
E)  1.9 mol 
A)  0.60 mol 
B)  0.75 mol 
C)  0.94 mol 
D)  1.7 mol 
E)  1.9 mol

Question 8

Which of the following is a strong acid?

Accepted Answer

A)  H3PO4 
B)  HNO3 
C)  HF 
D)  CH3COOH 
E)  H2O 
A)  H3PO4 
B)  HNO3 
C)  HF 
D)  CH3COOH 
E)  H2O

Question 9

Which one of the following is not a redox reaction?

Accepted Answer

A)  2Na(s) + 2H2O(l) F1F1F1S1F1F1F10 2NaOH(aq) + H2(g) 
B)  H2(g) + Cl2(g) F1F1F1S1F1F1F10 2HCl(g) 
C)  2H2O2(aq) F1F1F1S1F1F1F10 2H2O(l) + O2(g) 
D)  Fe2O3(s) + 3H2SO4(aq) F1F1F1S1F1F1F10 Fe2(SO4)3(aq) + 3H2O(l) 
E)  2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) F1F1F1S1F1F1F10 K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l) 
A)  2Na(s) + 2H2O(l) F1F1F1S1F1F1F10 2NaOH(aq) + H2(g) 
B)  H2(g) + Cl2(g) F1F1F1S1F1F1F10 2HCl(g) 
C)  2H2O2(aq) F1F1F1S1F1F1F10 2H2O(l) + O2(g) 
D)  Fe2O3(s) + 3H2SO4(aq) F1F1F1S1F1F1F10 Fe2(SO4)3(aq) + 3H2O(l) 
E)  2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) F1F1F1S1F1F1F10 K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l)

Question 10

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 11

Predict the product(s) for the following reaction. BaO(s) + CO2(g) F1F1F1S1F1F1F10

Accepted Answer

A)  Ba(s) + CO3(g) 
B)  BaCO3(s) 
C)  BaO(s) + C(s) 
D)  Ba(s) + CO32-(s) 
E)  No reaction occurs. 
A)  Ba(s) + CO3(g) 
B)  BaCO3(s) 
C)  BaO(s) + C(s) 
D)  Ba(s) + CO32-(s) 
E)  No reaction occurs.

Question 12

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 F1F1F1S1F1F1F10 6CO2 + 6H2O

Accepted Answer

A)  Hydrogen in C6H12O6 is being reduced. 
B)  Oxygen in O2 is being oxidized. 
C)  Hydrogen in C6H12O6 is the reducing agent. 
D)  Oxygen in C6H12O6 is the oxidizing agent. 
E)  Carbon in C6H12O6 is being oxidized. 
A)  Hydrogen in C6H12O6 is being reduced. 
B)  Oxygen in O2 is being oxidized. 
C)  Hydrogen in C6H12O6 is the reducing agent. 
D)  Oxygen in C6H12O6 is the oxidizing agent. 
E)  Carbon in C6H12O6 is being oxidized.

Question 13

Aluminum metal dissolved in hydrochloric acid as follows:
2Al(s) + 6HCl(aq) F1F1F1S1F1F1F10 2AlCl3(aq) + 3H2(g)
a. What is the minimum volume of 6.0 M HCl(aq) needed to completely dissolve 3.20 g of aluminum in this reaction?
b. What mass of AlCl3 would be produced by complete reaction of 3.20 g of aluminum?

Accepted Answer

a. 59.3 mL

Question 14

Magnesium carbonate, MgCO3, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Accepted Answer

A)  Mg2+ and CO32- 
B)  Na+ and Cl- 
C)  Mg2+ and Cl- 
D)  Na+ and CO32- 
E)  None of the above correctly identifies the spectator ions. 
A)  Mg2+ and CO32- 
B)  Na+ and Cl- 
C)  Mg2+ and Cl- 
D)  Na+ and CO32- 
E)  None of the above correctly identifies the spectator ions.

Question 15

Which of the following solutions will be the best conductor of electrical current?

Accepted Answer

A)  methyl alcohol, CH3OH(aq) 
B)  glucose, C6H12O6(aq) 
C)  potassium chloride, KCl(aq) 
D)  bromine, Br2(aq) 
E)  ethylene glycol, C2H6O2(aq) 
A)  methyl alcohol, CH3OH(aq) 
B)  glucose, C6H12O6(aq) 
C)  potassium chloride, KCl(aq) 
D)  bromine, Br2(aq) 
E)  ethylene glycol, C2H6O2(aq)

Question 16

Select the classification for the following reaction. NH3(aq) + HNO3(aq) F1F1F1S1F1F1F10 NH4NO3(aq)

Accepted Answer

A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  none of the above 
A)  precipitation 
B)  acid-base 
C)  redox 
D)  decomposition 
E)  none of the above

Question 17

All acid-base reactions produce a salt and water as the only products.

Accepted Answer

A) True 
 B)False

Question 18

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 (   = 106.45 g/mol).

Accepted Answer

A)  419 g 
B)  169 g 
C)  0.419 g 
D)  0.169 g 
E)  0.00394 g 
A)  419 g 
B)  169 g 
C)  0.419 g 
D)  0.169 g 
E)  0.00394 g

Question 19

Select the best statement relating to the following reaction: 
2MnO2(s) + KClO3(aq) + 2KOH(aq) F1F1F1S1F1F1F10 2KMnO4(aq) + KCl(aq) + H2O(l)

Accepted Answer

A)  Mn in MnO2 is oxidized. 
B)  O in KClO3 is the oxidizing agent. 
C)  K in KClO3 is the reducing agent. 
D)  H in KOH is oxidized. 
E)  Cl in KClO3 is the reducing agent. 
A)  Mn in MnO2 is oxidized. 
B)  O in KClO3 is the oxidizing agent. 
C)  K in KClO3 is the reducing agent. 
D)  H in KOH is oxidized. 
E)  Cl in KClO3 is the reducing agent.

Question 20

Complete and balance the equation for the following acid-base reaction.
Ca(OH)2(aq) + HCl(aq) F1F1F1S1F1F1F10

Accepted Answer

Ca(OH)₂(aq) + 2HCl(aq

Exam 4: The Major Classes of Chemical Reactions

Which one of the following is not a redox reaction?

Select the classification for the following reaction. Fe2+(aq) + 2OH-(aq)  Fe(OH)2(s)

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl2(l) ?

Select the classification for the following reaction. H2CO3(aq)  H2O(l) + CO2(g)

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Write down the oxidation number of the indicated atom in each of the following formulas: a. Si in SiO2 b. Cl in ClO2- c. Mn in KMnO4 d. C in C6H12O6

How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Which of the following is a strong acid?

Which one of the following is not a redox reaction?

The combustion of an element is always a combination reaction.

Predict the product(s) for the following reaction. BaO(s) + CO2(g) 

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2  6CO2 + 6H2O

Aluminum metal dissolved in hydrochloric acid as follows: 2Al(s) + 6HCl(aq)  2AlCl3(aq) + 3H2(g) a. What is the minimum volume of 6.0 M HCl(aq) needed to completely dissolve 3.20 g of aluminum in this reaction? b. What mass of AlCl3 would be produced by complete reaction of 3.20 g of aluminum?

Magnesium carbonate, MgCO3, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Which of the following solutions will be the best conductor of electrical current?

Select the classification for the following reaction. NH3(aq) + HNO3(aq)  NH4NO3(aq)

All acid-base reactions produce a salt and water as the only products.

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 ( = 106.45 g/mol).

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq)  2KMnO4(aq) + KCl(aq) + H2O(l)

Complete and balance the equation for the following acid-base reaction. Ca(OH)2(aq) + HCl(aq) 

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Select the classification for the following reaction. Fe²⁺(aq) + 2OH^-(aq)  Fe(OH)₂(s)

Predict the products by completing a balanced equation for the following decomposition reaction. CaCl₂(l) ?

Select the classification for the following reaction. H₂CO₃(aq)  H₂O(l) + CO₂(g)

Write down the oxidation number of the indicated atom in each of the following formulas: a. Si in SiO₂ b. Cl in ClO₂^- c. Mn in KMnO₄ d. C in C₆H₁₂O₆

How many moles of H⁺(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Predict the product(s) for the following reaction. BaO(s) + CO₂(g) 

Which of the statements below correctly describes the combustion of glucose, shown below? C₆H₁₂O₆ + 6O₂  6CO₂ + 6H₂O

Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Select the classification for the following reaction. NH₃(aq) + HNO₃(aq)  NH₄NO₃(aq)

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃( = 106.45 g/mol).

Select the best statement relating to the following reaction: 2MnO₂(s) + KClO₃(aq) + 2KOH(aq)  2KMnO₄(aq) + KCl(aq) + H₂O(l)

Complete and balance the equation for the following acid-base reaction. Ca(OH)₂(aq) + HCl(aq) 