Question 1

The solubility of manganese (II)hydroxide (Mn(OH)2)is   What is the Ksp of Mn(OH)2?

Accepted Answer

A) 1.1 × 10-14 
B) 4.3 × 10-14 
C) 2.1 × 10-14 
D) 4.8 × 10-10 
E) 2.2 × 10-5 
A) 1.1 × 10-14 
B) 4.3 × 10-14 
C) 2.1 × 10-14 
D) 4.8 × 10-10 
E) 2.2 × 10-5

Question 2

The solubility of a slightly soluble salt is increased by the presence of a second solute that provides a common ion to the system.

Accepted Answer

A) True 
 B)False

Question 3

The addition of hydrofluoric acid and ________ to water produces a buffer solution.

Accepted Answer

A) NaF 
B) HF 
C) NaN   
D) NaBr 
E) KI 
A) NaF 
B) HF 
C) NaN   
D) NaBr 
E) KI

Question 4

The solubility of lead (II)chloride (PbCl2)is   What is the Ksp of PbCl2?

Accepted Answer

A) 5.0 × 10-4 
B) 4.1 × 10-6 
C) 3.1 × 10-7 
D) 1.6 × 10-5 
E) 1.6 × 10-2 
A) 5.0 × 10-4 
B) 4.1 × 10-6 
C) 3.1 × 10-7 
D) 1.6 × 10-5 
E) 1.6 × 10-2

Question 5

Calculate the pH of a solution prepared by dissolving 0.270 mol of weak acid HA and 0.260 mol of its conjugate base in water sufficient to yield 1.00 L of solution.The   of HA is

Accepted Answer

A) 2.099 
B) 3.736 
C) 10.264 
D) 3.952 
E) 2.307 
A) 2.099 
B) 3.736 
C) 10.264 
D) 3.952 
E) 2.307

Question 6

The Ka of benzoic acid is 6.30 × 10-5.The pH of a buffer prepared by combining 50.0 mL of   potassium benzoate and 50.0 mL of 1.00 M benzoic acid is ________.

Accepted Answer

A) 1.705 
B) 0.851 
C) 3.406 
D) 4.201 
E) 2.383 
A) 1.705 
B) 0.851 
C) 3.406 
D) 4.201 
E) 2.383

Question 7

Determine the Ksp for magnesium hydroxide (Mg(OH)2)where the solubility of Mg(OH)2 is   .

Accepted Answer

A) 2.7 × 10-12 
B) 1.1 × 10-11 
C) 2.0 × 10-8 
D) 3.9 × 10-8 
E) 1.4 × 10-4 
A) 2.7 × 10-12 
B) 1.1 × 10-11 
C) 2.0 × 10-8 
D) 3.9 × 10-8 
E) 1.4 × 10-4

Question 8

A buffer solution with a pH of 4.63 is prepared with   acid and   formate. The   of formic acid is

Accepted Answer

A) 1.1 
B) 2.1 
C) 5.4 × 10-6 
D) 3.0 × 10-8 
E) 0.54 
A) 1.1 
B) 2.1 
C) 5.4 × 10-6 
D) 3.0 × 10-8 
E) 0.54

Question 9

A 25.0 mL sample of 0.150 M acetic acid is titrated with a 0.150 M NaOH solution.What is the pH at the equivalence point? The   of acetic acid is 4.50 × 10-4.

Accepted Answer

A) 11.74 
B) 9.26 
C) 4.74 
D) 7.00 
E) 8.81 
A) 11.74 
B) 9.26 
C) 4.74 
D) 7.00 
E) 8.81

Question 10

In which of the following aqueous solutions would you expect AgF to have the lowest solubility?

Accepted Answer

A) 0.030 M LiF 
B) pure water 
C) 0.023 M NaF 
D) 0.015 M KF 
E) 0.0075 M AgNO3 
A) 0.030 M LiF 
B) pure water 
C) 0.023 M NaF 
D) 0.015 M KF 
E) 0.0075 M AgNO3

Question 11

Which solution has the greatest buffering capacity?

Accepted Answer

A) 0.335 M NH3 and 0.100 M NH4Cl 
B) 0.085 M NH3 and 0.090 M NH4Cl 
C) 0.540 M NH3 and 0.550 M NH4Cl 
D) 0.200 M NH3 and 0.565 M NH4Cl 
E) They are all buffer solutions and would all have the same capacity. 
A) 0.335 M NH3 and 0.100 M NH4Cl 
B) 0.085 M NH3 and 0.090 M NH4Cl 
C) 0.540 M NH3 and 0.550 M NH4Cl 
D) 0.200 M NH3 and 0.565 M NH4Cl 
E) They are all buffer solutions and would all have the same capacity.

Question 12

What change will be caused by addition of a small amount of HCl to a solution containing fluoride ions and hydrogen fluoride?

Accepted Answer

A) The concentration of hydronium ions will increase significantly. 
B) The concentration of fluoride ions will increase as will the concentration of hydronium ions. 
C) The concentration of hydrogen fluoride will decrease and the concentration of fluoride ions will increase. 
D) The concentration of fluoride ion will decrease and the concentration of hydrogen fluoride will increase. 
E) The fluoride ions will precipitate out of solution as its acid salt. 
A) The concentration of hydronium ions will increase significantly. 
B) The concentration of fluoride ions will increase as will the concentration of hydronium ions. 
C) The concentration of hydrogen fluoride will decrease and the concentration of fluoride ions will increase. 
D) The concentration of fluoride ion will decrease and the concentration of hydrogen fluoride will increase. 
E) The fluoride ions will precipitate out of solution as its acid salt.

Question 13

The addition of HF and ________ to water produces a buffer solution.

Accepted Answer

A) HBr 
B) KNO3 
C) KOH 
D) NaCl 
E) NaBr 
A) HBr 
B) KNO3 
C) KOH 
D) NaCl 
E) NaBr

Question 14

Calculate the pH of a solution that is 0.278 M in sodium formate (   )and   in formic acid   The   of formic acid is 1.77 ×   .

Accepted Answer

A) 3.843 
B) 3.647 
C) 13.90 
D) 10.16 
E) 4.954 
A) 3.843 
B) 3.647 
C) 13.90 
D) 10.16 
E) 4.954

Question 15

Suppose you have just added 500.0 ml of a solution containing 0.2000 moles of acetic acid per liter to 200.0 ml of 0.250 M NaOH.What is the final pH?
 The Ka of acetic acid is 1.77 × 10-5.

Accepted Answer

Question 16

A 25.0 mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution.What is the pH after 26.0 mL of base is added? The   of hydrazoic acid is 1.9 × 10-5.

Accepted Answer

A) 2.54 
B) 11.47 
C) 7.00 
D) 4.70 
E) 4.74 
A) 2.54 
B) 11.47 
C) 7.00 
D) 4.70 
E) 4.74

Question 17

Of the substances below,________ will decrease the solubility of Pb(CN)2 in a saturated solution.

Accepted Answer

A) Pb(MnO4)2 
B) NaMnO4 
C) HMnO4 
D) H2O2 
E) NaCl 
A) Pb(MnO4)2 
B) NaMnO4 
C) HMnO4 
D) H2O2 
E) NaCl

Question 18

The concentration of fluoride ions in a saturated solution of barium fluoride is ________ M.The solubility product constant of BaF2 is

Accepted Answer

A) 3.8 × 10-4 
B) 3.0 × 10-3 
C) 1.5 × 10-2 
D) 7.5 × 10-3 
E) 1.4 × 10-4 
A) 3.8 × 10-4 
B) 3.0 × 10-3 
C) 1.5 × 10-2 
D) 7.5 × 10-3 
E) 1.4 × 10-4

Question 19

Calculate the pH of a solution prepared by dissolving   of benzoic acid and   of sodium benzoate in water sufficient to yield   of solution.The Ka of benzoic acid is

Accepted Answer

A) 2.516 
B) 3.892 
C) 4.502 
D) 10.158 
E) 4.195 
A) 2.516 
B) 3.892 
C) 4.502 
D) 10.158 
E) 4.195

Question 20

A 25.0 mL sample of 0.723 M HClO4 is titrated with a   KOH solution.The H3O+ concentration after the addition of   of KOH is ________ M.

Accepted Answer

A) 0.4 
B) 1 × 10-7 
C) 0.7 
D) 3 × 10-13 
E) 4 × 10-2 
A) 0.4 
B) 1 × 10-7 
C) 0.7 
D) 3 × 10-13 
E) 4 × 10-2

Exam 17: Additional Aspects of Aqueous Equilibria

The solubility of manganese (II)hydroxide (Mn(OH)2)is What is the Ksp of Mn(OH)2?

The solubility of a slightly soluble salt is increased by the presence of a second solute that provides a common ion to the system.

The addition of hydrofluoric acid and ________ to water produces a buffer solution.

The solubility of lead (II)chloride (PbCl2)is What is the Ksp of PbCl2?

Calculate the pH of a solution prepared by dissolving 0.270 mol of weak acid HA and 0.260 mol of its conjugate base in water sufficient to yield 1.00 L of solution.The of HA is

The Ka of benzoic acid is 6.30 × 10-5.The pH of a buffer prepared by combining 50.0 mL of potassium benzoate and 50.0 mL of 1.00 M benzoic acid is ________.

Determine the Ksp for magnesium hydroxide (Mg(OH)2)where the solubility of Mg(OH)2 is .

A buffer solution with a pH of 4.63 is prepared with acid and formate. The of formic acid is

A 25.0 mL sample of 0.150 M acetic acid is titrated with a 0.150 M NaOH solution.What is the pH at the equivalence point? The of acetic acid is 4.50 × 10-4.

In which of the following aqueous solutions would you expect AgF to have the lowest solubility?

Which solution has the greatest buffering capacity?

What change will be caused by addition of a small amount of HCl to a solution containing fluoride ions and hydrogen fluoride?

The addition of HF and ________ to water produces a buffer solution.

Calculate the pH of a solution that is 0.278 M in sodium formate ( )and in formic acid The of formic acid is 1.77 × .

Suppose you have just added 500.0 ml of a solution containing 0.2000 moles of acetic acid per liter to 200.0 ml of 0.250 M NaOH.What is the final pH? The Ka of acetic acid is 1.77 × 10-5.

A 25.0 mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution.What is the pH after 26.0 mL of base is added? The of hydrazoic acid is 1.9 × 10-5.

Of the substances below,________ will decrease the solubility of Pb(CN)2 in a saturated solution.

The concentration of fluoride ions in a saturated solution of barium fluoride is ________ M.The solubility product constant of BaF2 is

Calculate the pH of a solution prepared by dissolving of benzoic acid and of sodium benzoate in water sufficient to yield of solution.The Ka of benzoic acid is

A 25.0 mL sample of 0.723 M HClO4 is titrated with a KOH solution.The H3O+ concentration after the addition of of KOH is ________ M.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The solubility of manganese (II)hydroxide (Mn(OH)₂)is What is the K_sp of Mn(OH)₂?

The solubility of lead (II)chloride (PbCl₂)is What is the K_sp of PbCl₂?

The K_a of benzoic acid is 6.30 × 10^-5.The pH of a buffer prepared by combining 50.0 mL of potassium benzoate and 50.0 mL of 1.00 M benzoic acid is ________.

Determine the K_sp for magnesium hydroxide (Mg(OH)₂)where the solubility of Mg(OH)₂ is .

A 25.0 mL sample of 0.150 M acetic acid is titrated with a 0.150 M NaOH solution.What is the pH at the equivalence point? The of acetic acid is 4.50 × 10^-4.

Suppose you have just added 500.0 ml of a solution containing 0.2000 moles of acetic acid per liter to 200.0 ml of 0.250 M NaOH.What is the final pH? The K_a of acetic acid is 1.77 × 10^-5.

A 25.0 mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution.What is the pH after 26.0 mL of base is added? The of hydrazoic acid is 1.9 × 10^-5.

Of the substances below,________ will decrease the solubility of Pb(CN)₂ in a saturated solution.

The concentration of fluoride ions in a saturated solution of barium fluoride is ________ M.The solubility product constant of BaF₂ is

Calculate the pH of a solution prepared by dissolving of benzoic acid and of sodium benzoate in water sufficient to yield of solution.The K_a of benzoic acid is

A 25.0 mL sample of 0.723 M HClO₄ is titrated with a KOH solution.The H₃O⁺ concentration after the addition of of KOH is ________ M.