Question 1

Why does fluoride treatment render teeth more resistant to decay?

Accepted Answer

A) Fluoride kills the bacteria in the mouth that make the acids that decay teeth. 
B) Fluoride stimulates production of tooth enamel to replace that lost to decay. 
C) Fluoride reduces saliva production, keeping teeth drier and thus reducing decay. 
D) Fluoride converts hydroxyapatite to fluoroapatite that is less reactive with acids. 
E) Fluoride dissolves plaque, reducing its decaying contact with teeth. 
A) Fluoride kills the bacteria in the mouth that make the acids that decay teeth. 
B) Fluoride stimulates production of tooth enamel to replace that lost to decay. 
C) Fluoride reduces saliva production, keeping teeth drier and thus reducing decay. 
D) Fluoride converts hydroxyapatite to fluoroapatite that is less reactive with acids. 
E) Fluoride dissolves plaque, reducing its decaying contact with teeth.

Question 2

What is the pH of a solution which is prepared by mixing 55.0 mL of 0.183 M KOH and 10.0 mL of   HC2H3O2?

Accepted Answer

A) 13.122 
B) 9.97 
C) 7.74 
D) 0.878 
E) none of the above 
A) 13.122 
B) 9.97 
C) 7.74 
D) 0.878 
E) none of the above

Question 3

A solution of NaF is added dropwise to a solution that is 0.0122 M in   .When the concentration of   exceeds ________ M,   will precipitate.Neglect volume changes.For   ,

Accepted Answer

A) 7.0 ×   
B) 1.2 × 10-2 
C) 2.1 ×   
D) 3.0 ×   
E) 1.4 × 10-4 
A) 7.0 ×   
B) 1.2 × 10-2 
C) 2.1 ×   
D) 3.0 ×   
E) 1.4 × 10-4

Question 4

What is the solubility (in M)of PbCl2 in a   solution of HCl? The Ksp of PbCl2 is

Accepted Answer

A) 2.0 × 10-3 
B) 1.1 × 10-4 
C) 1.8 × 10-4 
D) 7.1 × 10-4 
E) 1.6 × 10-5 
A) 2.0 × 10-3 
B) 1.1 × 10-4 
C) 1.8 × 10-4 
D) 7.1 × 10-4 
E) 1.6 × 10-5

Question 5

Calculate the percent ionization of formic acid (   H)in a solution that is 0.152 M in formic acid.The   of formic acid is 1.77 ×   .

Accepted Answer

A) 2.74 ×   
B) 0.0180 
C) 3.44 
D) 0.581 
E) 8.44 
A) 2.74 ×   
B) 0.0180 
C) 3.44 
D) 0.581 
E) 8.44

Question 6

What is the pH of a buffer solution that is 0.266 M in lactic acid and 0.111 M in sodium lactate? The   of lactic acid is 1.4 ×   .

Accepted Answer

A) 14.38 
B) 10.53 
C) 5.38 
D) 3.47 
E) 4.23 
A) 14.38 
B) 10.53 
C) 5.38 
D) 3.47 
E) 4.23

Question 7

Which of the following could be added to a solution of acetic acid to prepare a buffer?

Accepted Answer

A) sodium acetate only 
B) sodium acetate or sodium hydroxide 
C) nitric acid only 
D) hydrofluoric acid or nitric acid 
E) sodium hydroxide only 
A) sodium acetate only 
B) sodium acetate or sodium hydroxide 
C) nitric acid only 
D) hydrofluoric acid or nitric acid 
E) sodium hydroxide only

Question 8

In general,the solubility of a slightly soluble salt is decreased by the presence of a second solute that furnishes a ________.

Accepted Answer

The answer of In general,the solubility of a slightly soluble...

Question 9

The pH of a solution prepared by mixing 40.0 mL of 0.125 M Mg(OH)2 and 150.0 mL of 0.125 M HCl is ________.

Accepted Answer

A) 6.29 
B) 4.11 
C) 1.14 
D) 5.78 
E) 1.34 
A) 6.29 
B) 4.11 
C) 1.14 
D) 5.78 
E) 1.34

Question 10

What is the pH of a buffer solution that is 0.172 M in hypochlorous acid (HClO)and 0.131 M in sodium hypochlorite? The   of hypochlorous acid is 3.8 ×   .

Accepted Answer

A) 14.12 
B) 6.70 
C) 9.07 
D) 7.54 
E) 7.30 
A) 14.12 
B) 6.70 
C) 9.07 
D) 7.54 
E) 7.30

Question 11

What is the pH of a solution which is prepared by dissolving 0.850 mol of N   and   of   in water sufficient to yield 1.00 L of solution? The   of ammonia is

Accepted Answer

A) 9.700 
B) 5.204 
C) 8.781 
D) 8.796 
E) 4.300 
A) 9.700 
B) 5.204 
C) 8.781 
D) 8.796 
E) 4.300

Question 12

Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF)and 0.180 M cesium fluoride (CsF).The Ka of hydrofluoric acid is 6.80 × 10-4.

Accepted Answer

Question 13

A buffer solution contains 0.100 M fluoride ions and 0.126 M hydrogen fluoride.What is the concentration (M)of hydrogen fluoride after addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of this solution?

Accepted Answer

A) 0.0900 
B) 0.122 
C) 0.130 
D) 0.0953 
E) 0.00976 
A) 0.0900 
B) 0.122 
C) 0.130 
D) 0.0953 
E) 0.00976

Question 14

The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL of 0.125 M HNO3 is ________.

Accepted Answer

A) 13.29 
B) 7.00 
C) 8.11 
D) 11.00 
E) 12.14 
A) 13.29 
B) 7.00 
C) 8.11 
D) 11.00 
E) 12.14

Question 15

The concentration of iodide ions in a saturated solution of lead (II)iodide is ________ M.The solubility product constant of PbI2 is

Accepted Answer

A) 3.8 × 10-4 
B) 3.0 × 10-3 
C) 1.5 × 10-3 
D) 3.5 × 10-9 
E) 1.4 × 10-8 
A) 3.8 × 10-4 
B) 3.0 × 10-3 
C) 1.5 × 10-3 
D) 3.5 × 10-9 
E) 1.4 × 10-8

Question 16

Which of the following could be added to a solution of sodium acetate to produce a buffer?

Accepted Answer

A) acetic acid only 
B) acetic acid or hydrochloric acid 
C) hydrochloric acid only 
D) potassium acetate only 
E) sodium chloride or potassium acetate 
A) acetic acid only 
B) acetic acid or hydrochloric acid 
C) hydrochloric acid only 
D) potassium acetate only 
E) sodium chloride or potassium acetate

Why does fluoride treatment render teeth more resistant to decay?

What is the pH of a solution which is prepared by mixing 55.0 mL of 0.183 M KOH and 10.0 mL of HC₂H₃O₂?

A solution of NaF is added dropwise to a solution that is 0.0122 M in .When the concentration of exceeds ________ M, will precipitate.Neglect volume changes.For ,

What is the solubility (in M)of PbCl₂ in a solution of HCl? The K_sp of PbCl₂ is

Calculate the percent ionization of formic acid ( H)in a solution that is 0.152 M in formic acid.The of formic acid is 1.77 × .

What is the pH of a buffer solution that is 0.266 M in lactic acid and 0.111 M in sodium lactate? The of lactic acid is 1.4 × .

Which of the following could be added to a solution of acetic acid to prepare a buffer?

In general,the solubility of a slightly soluble salt is decreased by the presence of a second solute that furnishes a ________.

The pH of a solution prepared by mixing 40.0 mL of 0.125 M Mg(OH)₂ and 150.0 mL of 0.125 M HCl is ________.

What is the pH of a buffer solution that is 0.172 M in hypochlorous acid (HClO)and 0.131 M in sodium hypochlorite? The of hypochlorous acid is 3.8 × .

What is the pH of a solution which is prepared by dissolving 0.850 mol of N and of in water sufficient to yield 1.00 L of solution? The of ammonia is

Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF)and 0.180 M cesium fluoride (CsF).The K_a of hydrofluoric acid is 6.80 × 10^-4.

A buffer solution contains 0.100 M fluoride ions and 0.126 M hydrogen fluoride.What is the concentration (M)of hydrogen fluoride after addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of this solution?

The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL of 0.125 M HNO₃ is ________.

The concentration of iodide ions in a saturated solution of lead (II)iodide is ________ M.The solubility product constant of PbI₂ is

Which of the following could be added to a solution of sodium acetate to produce a buffer?

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

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Exam 17: Additional Aspects of Aqueous Equilibria

Why does fluoride treatment render teeth more resistant to decay?

What is the pH of a solution which is prepared by mixing 55.0 mL of 0.183 M KOH and 10.0 mL of HC2H3O2?

A solution of NaF is added dropwise to a solution that is 0.0122 M in .When the concentration of exceeds ________ M, will precipitate.Neglect volume changes.For ,

What is the solubility (in M)of PbCl2 in a solution of HCl? The Ksp of PbCl2 is

Calculate the percent ionization of formic acid ( H)in a solution that is 0.152 M in formic acid.The of formic acid is 1.77 × .

What is the pH of a buffer solution that is 0.266 M in lactic acid and 0.111 M in sodium lactate? The of lactic acid is 1.4 × .

Which of the following could be added to a solution of acetic acid to prepare a buffer?

In general,the solubility of a slightly soluble salt is decreased by the presence of a second solute that furnishes a ________.

The pH of a solution prepared by mixing 40.0 mL of 0.125 M Mg(OH)2 and 150.0 mL of 0.125 M HCl is ________.

What is the pH of a buffer solution that is 0.172 M in hypochlorous acid (HClO)and 0.131 M in sodium hypochlorite? The of hypochlorous acid is 3.8 × .

What is the pH of a solution which is prepared by dissolving 0.850 mol of N and of in water sufficient to yield 1.00 L of solution? The of ammonia is

Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF)and 0.180 M cesium fluoride (CsF).The Ka of hydrofluoric acid is 6.80 × 10-4.

A buffer solution contains 0.100 M fluoride ions and 0.126 M hydrogen fluoride.What is the concentration (M)of hydrogen fluoride after addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of this solution?

The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL of 0.125 M HNO3 is ________.

The concentration of iodide ions in a saturated solution of lead (II)iodide is ________ M.The solubility product constant of PbI2 is

Which of the following could be added to a solution of sodium acetate to produce a buffer?

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

What is the pH of a solution which is prepared by mixing 55.0 mL of 0.183 M KOH and 10.0 mL of HC₂H₃O₂?

What is the solubility (in M)of PbCl₂ in a solution of HCl? The K_sp of PbCl₂ is

The pH of a solution prepared by mixing 40.0 mL of 0.125 M Mg(OH)₂ and 150.0 mL of 0.125 M HCl is ________.

Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF)and 0.180 M cesium fluoride (CsF).The K_a of hydrofluoric acid is 6.80 × 10^-4.

The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL of 0.125 M HNO₃ is ________.

The concentration of iodide ions in a saturated solution of lead (II)iodide is ________ M.The solubility product constant of PbI₂ is