Question 1

Which of the following is a Lewis base?

Accepted Answer

A)  BCl3 
B)  Cu2+ 
C)  Cl- 
D)  Mn2+ 
E)  NH4+ 
A)  BCl3 
B)  Cu2+ 
C)  Cl- 
D)  Mn2+ 
E)  NH4+

Question 2

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 the above 
A)  2.07 
B)  4.77 
C)  9.23 
D)  11.93 
E)  none of the above

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-) = 1.5 × 10-10

Accepted Answer

A)  0.38 
B)  5.91 
C)  8.09 
D)  9.82 
E)  13.62 
A)  0.38 
B)  5.91 
C)  8.09 
D)  9.82 
E)  13.62

Question 5

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35 × 10-3 M?

Accepted Answer

A)  4.26 × 10-5 M 
B)  2.35 × 10-11 M 
C)  4.26 × 10-12 M 
D)  2.35 × 10-17 M 
E)  none of the above 
A)  4.26 × 10-5 M 
B)  2.35 × 10-11 M 
C)  4.26 × 10-12 M 
D)  2.35 × 10-17 M 
E)  none of the above

Question 6

A solution is prepared by adding 0.10 mol of sodium sulfide, Na2S, 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 concentration of sodium ions and sulfide ions will be identical. 
E)  The concentration of sulfide 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 concentration of sodium ions and sulfide ions will be identical. 
E)  The concentration of sulfide ions will be greater than the concentration of sodium ions.

Question 7

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Accepted Answer

A)  2.34 × 10-4 M 
B)  2.29 × 10-6 M 
C)  4.37 × 10-9 M 
D)  4.27 × 10-11 M 
E)  8.360 M 
A)  2.34 × 10-4 M 
B)  2.29 × 10-6 M 
C)  4.37 × 10-9 M 
D)  4.27 × 10-11 M 
E)  8.360 M

Question 8

Select the strongest acid from the following list.

Accepted Answer

A)  HBrO4 
B)  HClO 
C)  HBrO2 
D)  HBrO 
E)  HIO 
A)  HBrO4 
B)  HClO 
C)  HBrO2 
D)  HBrO 
E)  HIO

Question 9

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A)  0.12 
B)  0.29 
C)  0.63 
D)  0.82 
E)  > 1.0 
A)  0.12 
B)  0.29 
C)  0.63 
D)  0.82 
E)  > 1.0

Question 10

Which of the following pairs has the stronger acid listed first?

Accepted Answer

A)  H2AsO3, H2AsO4 
B)  HI, HBr 
C)  HClO, HClO3 
D)  H2S, HCl 
E)  H2SO3, H2SO4 
A)  H2AsO3, H2AsO4 
B)  HI, HBr 
C)  HClO, HClO3 
D)  H2S, HCl 
E)  H2SO3, H2SO4

Question 11

A solution is prepared by adding 0.10 mol of potassium acetate, KCH3COO, 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 potassium ions and acetate ions will be identical. 
E)  The concentration of acetate ions will be greater than the concentration of potassium ions. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  The concentrations of potassium ions and acetate ions will be identical. 
E)  The concentration of acetate ions will be greater than the concentration of potassium ions.

Question 12

Consider the reaction: BF3 + F- F1F1F1S1F1F1F10 BF4-
Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

Accepted Answer

Yes, according to Lewis, this

Question 13

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 14

Which of the following liquids contains the strongest acid?

Accepted Answer

A)  0.1 M HA, pH = 6.85 
B)  0.1 M HD, pH = 7.22 
C)  0.1 M HE, pH = 8.34 
D)  0.1 M HJ, pH = 11.88 
E)  pure water 
A)  0.1 M HA, pH = 6.85 
B)  0.1 M HD, pH = 7.22 
C)  0.1 M HE, pH = 8.34 
D)  0.1 M HJ, pH = 11.88 
E)  pure water

Question 15

A student adds 0.1 mol of oxalic acid and 0.1 mol of sodium dihydrogen phosphate to enough water to make 1.0 L of solution. The following equilibrium is established with the concentrations of the products greater than the concentrations of the reactants. Which of the statements about the equilibrium system is correct? 
H2C2O4(aq) + H2PO4-(aq)   HC2O4-(aq) + H3PO4(aq)

Accepted Answer

A)  Oxalic acid is a weaker acid than phosphoric acid. 
B)  The hydrogen oxalate anion, HC2O4-, is a stronger base than the dihydrogen phosphate anion, H2PO4-. 
C)  Phosphoric acid is a weaker acid than oxalic acid. 
D)  The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid. 
E)  Water is a stronger acid than either oxalic or phosphoric acids. 
A)  Oxalic acid is a weaker acid than phosphoric acid. 
B)  The hydrogen oxalate anion, HC2O4-, is a stronger base than the dihydrogen phosphate anion, H2PO4-. 
C)  Phosphoric acid is a weaker acid than oxalic acid. 
D)  The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid. 
E)  Water is a stronger acid than either oxalic or phosphoric acids.

Question 16

The substance Ca(OH)2 is considered

Accepted Answer

A)  a weak Arrhenius acid. 
B)  a weak Arrhenius base. 
C)  a strong Arrhenius acid. 
D)  a strong Arrhenius base. 
E)  a neutral compound. 
A)  a weak Arrhenius acid. 
B)  a weak Arrhenius base. 
C)  a strong Arrhenius acid. 
D)  a strong Arrhenius base. 
E)  a neutral compound.

Question 17

The strongest base which can exist in water is the hydroxide ion.

Accepted Answer

A) True 
 B)False

Question 18

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 the above 
A)  0.89 
B)  1.12 
C)  1.30 
D)  3.00 
E)  none of the above

Question 19

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO3)3, 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 value of Ka for the species in solution must be known before a prediction can be made. 
E)  The value of 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)  The value of Ka for the species in solution must be known before a prediction can be made. 
E)  The value of Kb for the species in solution must be known before a prediction can be made.

Question 20

The substance (CH3CH2)2NH is considered

Accepted Answer

A)  a weak acid. 
B)  a weak base. 
C)  a strong acid. 
D)  a strong base. 
E)  a neutral compound. 
A)  a weak acid. 
B)  a weak base. 
C)  a strong acid. 
D)  a strong base. 
E)  a neutral compound.

Exam 18: Acid-Base Equilibria

Which of the following is a Lewis base?

What is the pOH of a 0.0085 M KOH solution?

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

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-) = 1.5 × 10-10

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35 × 10-3 M?

A solution is prepared by adding 0.10 mol of sodium sulfide, Na2S, to 1.00 L of water. Which statement about the solution is correct?

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Select the strongest acid from the following list.

What is the pH of a 0.75 M HNO3 solution?

Which of the following pairs has the stronger acid listed first?

A solution is prepared by adding 0.10 mol of potassium acetate, KCH3COO, to 1.00 L of water. Which statement about the solution is correct?

Consider the reaction: BF3 + F-  BF4- Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

Select the strongest acid from the following list.

Which of the following liquids contains the strongest acid?

The substance Ca(OH)2 is considered

The strongest base which can exist in water is the hydroxide ion.

What is the pH of a 0.050 M HBr solution?

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO3)3, to 1.00 L of water. Which statement about the solution is correct?

The substance (CH3CH2)2NH is considered

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The 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: 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

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

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

What is the pH of a 0.0100 M sodium benzoate solution? K_b (C₇H₅O₂^-) = 1.5 × 10^-10

What is the [OH^-] for a solution at 25°C that has [H₃O⁺] = 2.35 × 10^-3 M?

A solution is prepared by adding 0.10 mol of sodium sulfide, Na₂S, to 1.00 L of water. Which statement about the solution is correct?

What is the [H₃O⁺] for a solution at 25°C that has pOH = 5.640?

What is the pH of a 0.75 M HNO₃solution?

A solution is prepared by adding 0.10 mol of potassium acetate, KCH₃COO, to 1.00 L of water. Which statement about the solution is correct?

Consider the reaction: BF₃ + F^-  BF₄^- Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

The substance Ca(OH)₂is considered

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO₃)₃, to 1.00 L of water. Which statement about the solution is correct?

The substance (CH₃CH₂)₂NH is considered