Question 1

The substance BaCl2 is a:

Accepted Answer

A)  salt 
B)  weak acid 
C)  strong base 
D)  weak base 
E)  strong acid 
A)  salt 
B)  weak acid 
C)  strong base 
D)  weak base 
E)  strong acid

Question 2

A solution of potassium permanganate was standardized by titration of a solution prepared by dissolving 0.268 g of pure sodium oxalate in approximately 25 mL of distilled water. A 31.4 mL volume of titrant was required to reach the end-point. The reaction is: 2 MnO4- + 5 C2O42- + 16 H+ → 2 Mn2+ + 10 CO2 + 8 H2O.
What is the molarity of MnO4- ?

Accepted Answer

A)  0.0174 M 
B)  0.0255 M 
C)  0.0348 M 
D)  0.0637 M 
E)  0.159 M 
A)  0.0174 M 
B)  0.0255 M 
C)  0.0348 M 
D)  0.0637 M 
E)  0.159 M

Question 3

Trace amounts of oxygen gas can be "scrubbed" from gases using the following reaction: 4Cr2+(aq) + O2(g) + 4H+(aq) → 4Cr3+(aq) + 2H2O(l)
Which of the following statements is true regarding this reaction?

Accepted Answer

A)  Oxygen gas is reduced to water. 
B)  Cr2+(aq) is the oxidizing agent. 
C)  O2(g) is the reducing agent. 
D)  Electrons are transferred from O2 to Cr2+. 
A)  Oxygen gas is reduced to water. 
B)  Cr2+(aq) is the oxidizing agent. 
C)  O2(g) is the reducing agent. 
D)  Electrons are transferred from O2 to Cr2+.

Question 4

Which of the following represents a disproportionation reaction?

Accepted Answer

A)  Br2 + H2O → HOBr + Br- + H+ 
B)  S + SO2 + H2O → S2O32- + 2 H+ 
C)  HOCl + OH- → H2O + OCl- 
D)  3 S2- + 2 CrO42- + 8 H2O → 3 S + 2 Cr(OH)3 + 10 OH- 
E)  HF → H+ + F- 
A)  Br2 + H2O → HOBr + Br- + H+ 
B)  S + SO2 + H2O → S2O32- + 2 H+ 
C)  HOCl + OH- → H2O + OCl- 
D)  3 S2- + 2 CrO42- + 8 H2O → 3 S + 2 Cr(OH)3 + 10 OH- 
E)  HF → H+ + F-

Question 5

Choose the INCORRECT statement.

Accepted Answer

A)  Most molecular compounds are either nonelectrolytes or weak electrolytes. 
B)  Most ionic compounds are strong electrolytes. 
C)  A precipitate is formed when certain anions and cations react to form an insoluble ionic solid. 
D)  Net ionic equations include only the actual participants of the reaction. 
E)  An acid produces hydride ions in solution. 
A)  Most molecular compounds are either nonelectrolytes or weak electrolytes. 
B)  Most ionic compounds are strong electrolytes. 
C)  A precipitate is formed when certain anions and cations react to form an insoluble ionic solid. 
D)  Net ionic equations include only the actual participants of the reaction. 
E)  An acid produces hydride ions in solution.

Question 6

Which of the following, in aqueous solution, is most likely to behave as a weak acid?

Accepted Answer

A)  HCl 
B)  HCN 
C)  NaCl 
D)  NaCN 
E)  NH3 
A)  HCl 
B)  HCN 
C)  NaCl 
D)  NaCN 
E)  NH3

Question 7

The substance HI is a:

Accepted Answer

A)  strong acid 
B)  weak base 
C)  strong base 
D)  salt 
E)  weak acid 
A)  strong acid 
B)  weak base 
C)  strong base 
D)  salt 
E)  weak acid

Question 8

The neutralization of 25.0 mL of 0.24 M HCl requires 5.0 mL of NaOH. What is the molarity of the NaOH solution?

Accepted Answer

A)  0.6 M 
B)  2.4 M 
C)  5.0 M 
D)  0.048 M 
E)  1.2 M 
A)  0.6 M 
B)  2.4 M 
C)  5.0 M 
D)  0.048 M 
E)  1.2 M

Question 9

Which of the following solutions has the highest fluoride concentration?

Accepted Answer

A)  0.05 M CaF2 
B)  2.1 mg NaF/L 
C)  a solution having 1.5 mg F-/L 
D)  a solution having 0.06 M F- 
E)  0.05 M NaF 
A)  0.05 M CaF2 
B)  2.1 mg NaF/L 
C)  a solution having 1.5 mg F-/L 
D)  a solution having 0.06 M F- 
E)  0.05 M NaF

Question 10

Complete the equation and indicate if a precipitate forms. Ag+ + Br- + NO3- + K+ →

Accepted Answer

A)  AgBr(s) + K+ + NO3- 
B)  AgNO3(s) + K+ + Br- 
C)  AgBr(s) + KNO3(s) 
D)  KNO3(s) + Ag+ + Br- 
E)  no reaction 
A)  AgBr(s) + K+ + NO3- 
B)  AgNO3(s) + K+ + Br- 
C)  AgBr(s) + KNO3(s) 
D)  KNO3(s) + Ag+ + Br- 
E)  no reaction

Question 11

A solution is 0.660 M in HNO3 and 1.02 M in Ca(NO3)2. What is the molarity of NO3- in the solution?

Accepted Answer

A)  2.70 M 
B)  1.68 M 
C)  1.02 M 
D)  0.660 M 
E)  0.360 M 
A)  2.70 M 
B)  1.68 M 
C)  1.02 M 
D)  0.660 M 
E)  0.360 M

Question 12

Most water-soluble compounds of Group 1A or 2A elements are:

Accepted Answer

A)  strong electrolytes 
B)  strong acids 
C)  weak electrolytes 
D)  weak acids 
E)  nonelectrolytes 
A)  strong electrolytes 
B)  strong acids 
C)  weak electrolytes 
D)  weak acids 
E)  nonelectrolytes

Question 13

A solid forming from a mixture of solutions is called a precipitate.

Accepted Answer

A) True 
 B)False

Question 14

Write the net ionic equation for the reaction of magnesium carbonate and nitric acid.

Accepted Answer

A)  MgCO3(s) + 2 H+ → Mg2+ + H2O + CO2(g) 
B)  MgCO3(s) + 2 HNO3(aq) → Mg(NO3)2 + H2O + CO2(g) 
C)  MgCO3(s) + 2 HNO3(aq) → Mg(NO3)2(aq) + H2CO3(aq) 
D)  Mg2+ + CO32- + 2 H+ → Mg2+ + H2O + CO2(g) 
E)  no reaction 
A)  MgCO3(s) + 2 H+ → Mg2+ + H2O + CO2(g) 
B)  MgCO3(s) + 2 HNO3(aq) → Mg(NO3)2 + H2O + CO2(g) 
C)  MgCO3(s) + 2 HNO3(aq) → Mg(NO3)2(aq) + H2CO3(aq) 
D)  Mg2+ + CO32- + 2 H+ → Mg2+ + H2O + CO2(g) 
E)  no reaction

Question 15

In a solution that is 0.50 M CH3COOH(aq) (acetic acid), the species with a concentration of approximately 0.50 M is ________.

Accepted Answer

A)  HC2H3O2 
B)  C2H3O2- 
C)  H+ 
D)  H+ and C2H3O2- 
A)  HC2H3O2 
B)  C2H3O2- 
C)  H+ 
D)  H+ and C2H3O2-

Question 16

Which of the following represents a neutralization reaction?

Accepted Answer

A)  2 H2(g) + O2(g) → 2 H2O(l) 
B)  NH3(aq) + HCl(aq) → NH4Cl(aq) 
C)  2 NaOH(aq) + CuCl2(aq) → 2 NaCl(aq) + Cu(OH)2(s) 
D)  HBr(aq) + AgNO3(aq) → HNO3(aq) + AgBr(s) 
E)  2 H2O2(aq) → 2 H2O(l) + O2(g) 
A)  2 H2(g) + O2(g) → 2 H2O(l) 
B)  NH3(aq) + HCl(aq) → NH4Cl(aq) 
C)  2 NaOH(aq) + CuCl2(aq) → 2 NaCl(aq) + Cu(OH)2(s) 
D)  HBr(aq) + AgNO3(aq) → HNO3(aq) + AgBr(s) 
E)  2 H2O2(aq) → 2 H2O(l) + O2(g)

Question 17

The substance C5H5OH in water solution is a:

Accepted Answer

A)  weak electrolyte 
B)  strong acid 
C)  strong electrolyte 
D)  nonelectrolyte 
E)  strong base 
A)  weak electrolyte 
B)  strong acid 
C)  strong electrolyte 
D)  nonelectrolyte 
E)  strong base

Exam 5: Introduction to Reactions in Aqueous Solutions

The substance BaCl2 is a:

Trace amounts of oxygen gas can be "scrubbed" from gases using the following reaction: 4Cr2+(aq) + O2(g) + 4H+(aq) → 4Cr3+(aq) + 2H2O(l) Which of the following statements is true regarding this reaction?

Which of the following represents a disproportionation reaction?

Choose the INCORRECT statement.

Which of the following, in aqueous solution, is most likely to behave as a weak acid?

The substance HI is a:

The neutralization of 25.0 mL of 0.24 M HCl requires 5.0 mL of NaOH. What is the molarity of the NaOH solution?

Which of the following solutions has the highest fluoride concentration?

Complete the equation and indicate if a precipitate forms. Ag+ + Br- + NO3- + K+ →

A solution is 0.660 M in HNO3 and 1.02 M in Ca(NO3)2. What is the molarity of NO3- in the solution?

Most water-soluble compounds of Group 1A or 2A elements are:

A solid forming from a mixture of solutions is called a precipitate.

Write the net ionic equation for the reaction of magnesium carbonate and nitric acid.

In a solution that is 0.50 M CH3COOH(aq) (acetic acid), the species with a concentration of approximately 0.50 M is ________.

Which of the following represents a neutralization reaction?

The substance C5H5OH in water solution is a:

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

The substance BaCl₂ is a:

Trace amounts of oxygen gas can be "scrubbed" from gases using the following reaction: 4Cr²⁺(aq) + O₂(g) + 4H⁺(aq) → 4Cr³⁺(aq) + 2H₂O(l) Which of the following statements is true regarding this reaction?

Complete the equation and indicate if a precipitate forms. Ag+ + Br- + NO₃^- + K⁺ →

A solution is 0.660 M in HNO₃ and 1.02 M in Ca(NO₃)₂. What is the molarity of NO₃^- in the solution?

In a solution that is 0.50 M CH₃COOH(aq) (acetic acid), the species with a concentration of approximately 0.50 M is ________.

The substance C₅H₅OH in water solution is a: