Question 1

What is the value of Kb for the cyanide anion, CN-? Ka(HCN) = 6.2 × 10-10

Accepted Answer

A)  1.6 × 10-4 
B)  1.6 × 10-5 
C)  3.8 × 10-4 
D)  3.8 × 10-5 
E)  6.2 × 104 
A)  1.6 × 10-4 
B)  1.6 × 10-5 
C)  3.8 × 10-4 
D)  3.8 × 10-5 
E)  6.2 × 104

Question 2

What is the pH of a 0.00200 M HClO4 solution?

Accepted Answer

A)  0.995 
B)  1.378 
C)  2.699 
D)  6.215 
E)  None of these choices are correct. 
A)  0.995 
B)  1.378 
C)  2.699 
D)  6.215 
E)  None of these choices are correct.

Question 3

A solution of sodium acetate (CH3COONa) in water is weakly basic.

Accepted Answer

A) True 
 B)False

Question 4

Which one of the following substances will give an aqueous solution of pH < 7?

Accepted Answer

A)  KI 
B)  NH4Br 
C)  Na2CO3 
D)  CH3COONa 
E)  CH3OH 
A)  KI 
B)  NH4Br 
C)  Na2CO3 
D)  CH3COONa 
E)  CH3OH

Question 5

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is weakly acidic. 
D)  The solution is strongly acidic. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is weakly acidic. 
D)  The solution is strongly acidic. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 6

A solution is prepared by adding 0.10 mol of potassium chloride, KCl, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  One needs to know the temperature before any of these predictions can be made. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  One needs to know the temperature before any of these predictions can be made. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 7

What is the pH of a 0.010 M triethanolammonium chloride, (HOC2H2)3NHCl, solution? Kb, ((HOC2H2)3N) = 5.9 × 10-7

Accepted Answer

A)  2.75 
B)  4.89 
C)  9.11 
D)  11.25 
E)  None of these choices are correct. 
A)  2.75 
B)  4.89 
C)  9.11 
D)  11.25 
E)  None of these choices are correct.

Question 8

Which of the following aqueous liquids is the most acidic?

Accepted Answer

A)  0.1 M Al(NO3)3, Ka = 1 × 10-5 
B)  0.1 M Be(NO3)2, Ka = 4 × 10-6 
C)  0.1 M Pb(NO3)2, Ka = 3 × 10-8 
D)  0.1 M Ni(NO3)2, Ka = 1 × 10-10 
E)  pure water 
A)  0.1 M Al(NO3)3, Ka = 1 × 10-5 
B)  0.1 M Be(NO3)2, Ka = 4 × 10-6 
C)  0.1 M Pb(NO3)2, Ka = 3 × 10-8 
D)  0.1 M Ni(NO3)2, Ka = 1 × 10-10 
E)  pure water

Question 9

Which of the following aqueous liquids will have the highest pH?

Accepted Answer

A)  0.1 M CH3COOH, pKa = 4.7 
B)  0.1 M CuCl2, pKa = 7.5 
C)  0.1 M H3C6H5O7, pKa = 3.1 
D)  0.1 M ZnCl2, pKa = 9.0 
E)  pure water 
A)  0.1 M CH3COOH, pKa = 4.7 
B)  0.1 M CuCl2, pKa = 7.5 
C)  0.1 M H3C6H5O7, pKa = 3.1 
D)  0.1 M ZnCl2, pKa = 9.0 
E)  pure water

Question 10

Select the strongest acid from the following list.

Accepted Answer

A)  HBrO 
B)  HBrO2 
C)  HClO2 
D)  HClO3 
E)  HIO 
A)  HBrO 
B)  HBrO2 
C)  HClO2 
D)  HClO3 
E)  HIO

Question 11

Which of the following aqueous systems has the highest pH?

Accepted Answer

A)  0.1 M HA, pKa = 11.89 
B)  0.1 M HMO, pKa = 8.23 
C)  0.1 M HA, pKa = 4.55 
D)  0.1 M HBO, pKa = 2.43 
E)  pure water 
A)  0.1 M HA, pKa = 11.89 
B)  0.1 M HMO, pKa = 8.23 
C)  0.1 M HA, pKa = 4.55 
D)  0.1 M HBO, pKa = 2.43 
E)  pure water

Question 12

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Accepted Answer

A)  0.36 
B)  2.4 × 10-2 
C)  7.8 × 10-3 
D)  1.5 × 10-5 
E)  None of these choices are correct. 
A)  0.36 
B)  2.4 × 10-2 
C)  7.8 × 10-3 
D)  1.5 × 10-5 
E)  None of these choices are correct.

Question 13

Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH4Cl, is correct?

Accepted Answer

A)  The solution is weakly basic. 
B)  The solution is strongly basic. 
C)  The solution is neutral. 
D)  The solution is acidic. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A)  The solution is weakly basic. 
B)  The solution is strongly basic. 
C)  The solution is neutral. 
D)  The solution is acidic. 
E) The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 14

What is the pOH of a 0.0085 M KOH solution?

Accepted Answer

A)  2.07 
B)  4.77 
C)  9.23 
D)  11.93 
E)  None of these choices are correct. 
A)  2.07 
B)  4.77 
C)  9.23 
D)  11.93 
E)  None of these choices are correct.

Question 15

A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  The concentrations of fluoride ions and sodium ions will be identical. 
E)  The concentration of fluoride ions will be greater than the concentration of sodium ions. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  The concentrations of fluoride ions and sodium ions will be identical. 
E)  The concentration of fluoride ions will be greater than the concentration of sodium ions.

Question 16

What is the pH of a 0.050 M HBr solution?

Accepted Answer

A)  0.89 
B)  1.12 
C)  1.30 
D)  3.00 
E)  None of these choices are correct. 
A)  0.89 
B)  1.12 
C)  1.30 
D)  3.00 
E)  None of these choices are correct.

Question 17

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Accepted Answer

A)  7.2 × 101 
B)  0.16 
C)  0.099 
D)  0.0014 
E)  0.00027 
A)  7.2 × 101 
B)  0.16 
C)  0.099 
D)  0.0014 
E)  0.00027

Question 18

Which of the following is the strongest base?

Accepted Answer

A)  CH3NH2 
B)  NaNO3 
C)  B(OH)3 
D)  Al(OH)3 
E)  LiOH 
A)  CH3NH2 
B)  NaNO3 
C)  B(OH)3 
D)  Al(OH)3 
E)  LiOH

Question 19

A 0.050 M solution of the weak acid HA has [H3O+] = 3.77 × 10-4 M. What is the Ka for the acid?

Accepted Answer

A)  7.5 × 10-3 M 
B)  2.8 × 10-6 M 
C)  7.0 × 10-7 M 
D)  7.0 × 10-8 M 
E)  2.6 × 10-11 M 
A)  7.5 × 10-3 M 
B)  2.8 × 10-6 M 
C)  7.0 × 10-7 M 
D)  7.0 × 10-8 M 
E)  2.6 × 10-11 M

Question 20

If a strong acid such as HCl is diluted sufficiently with water, the pH will be higher than 7.

Accepted Answer

A) True 
 B)False

Exam 18: Acid-Base Equilibria

What is the value of Kb for the cyanide anion, CN-? Ka(HCN) = 6.2 × 10-10

What is the pH of a 0.00200 M HClO4 solution?

A solution of sodium acetate (CH3COONa) in water is weakly basic.

Which one of the following substances will give an aqueous solution of pH < 7?

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, to 1.00 L of water. Which statement about the solution is correct?

A solution is prepared by adding 0.10 mol of potassium chloride, KCl, to 1.00 L of water. Which statement about the solution is correct?

What is the pH of a 0.010 M triethanolammonium chloride, (HOC2H2)3NHCl, solution? Kb, ((HOC2H2)3N) = 5.9 × 10-7

Which of the following aqueous liquids is the most acidic?

Which of the following aqueous liquids will have the highest pH?

Select the strongest acid from the following list.

Which of the following aqueous systems has the highest pH?

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH4Cl, is correct?

What is the pOH of a 0.0085 M KOH solution?

A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, to 1.00 L of water. Which statement about the solution is correct?

What is the pH of a 0.050 M HBr solution?

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Which of the following is the strongest base?

A 0.050 M solution of the weak acid HA has [H3O+] = 3.77 × 10-4 M. What is the Ka for the acid?

If a strong acid such as HCl is diluted sufficiently with water, the pH will be higher than 7.

Keys to Studying Chemistry Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

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

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Equilibrium the Extent of Chemical Reactions

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

What is the value of K_b for the cyanide anion, CN-? _K_a(HCN) = 6.2 × 10^-10

What is the pH of a 0.00200 M HClO₄ solution?

A solution of sodium acetate (CH₃COONa) in water is weakly basic.

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO₃, to 1.00 L of water. Which statement about the solution is correct?

What is the pH of a 0.010 M triethanolammonium chloride, (HOC₂H₂)₃NHCl, solution? K_b, ((HOC₂H₂)₃N) = 5.9 × 10^-7

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the K_a for the acid?

Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH₄Cl, is correct?

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of K_a for this acid?

A 0.050 M solution of the weak acid HA has [H₃O⁺] = 3.77 × 10^-4 M. What is the K_a for the acid?