Question 1

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid HS1U1B12S1U1B0A with NaOH.  
-Which point a-d represents pKa1?

Accepted Answer

A) point a 
B) point b 
C) point c 
D) point d 
A) point a 
B) point b 
C) point c 
D) point d

Question 2

The following pictures represent solutions that contain a weak acid HA and/or its potassium salt KA.Unshaded spheres represent H atoms and shaded spheres represent AS1U1P1-S1S1P0 ions.(KS1U1P1+S1S1P0,HS1U1B13S1U1B0OS1U1P1+S1S1P0,OHS1U1P1-S1S1P0,and solvent HS1U1B12S1U1B0O molecules have been omitted for clarity. )  
-Which solution has the largest percent dissociation of HA?

Accepted Answer

A) (1) 
B) (2) 
C) (3) 
D) (4) 
A) (1) 
B) (2) 
C) (3) 
D) (4)

Question 3

0.10 M potassium chromate is slowly added to a solution containing 0.20 M AgNO3 and 0.20 M Ba(NO3)2.What is the Ag+ concentration when BaCrO4 just starts to precipitate? Ksp for Ag2CrO4 and BaCrO4 are 1.1 × 10-12 and 1.2 × 10-10,respectively.

Accepted Answer

A) 6.5 × 10-5 M 
B) 1.3 × 10-4 M 
C) 3.2 × 10-4 M 
D) 4.3 × 10-2 M 
A) 6.5 × 10-5 M 
B) 1.3 × 10-4 M 
C) 3.2 × 10-4 M 
D) 4.3 × 10-2 M

Question 4

What is the molar solubility of AgCl in 1.0 M K2S2O3 if the complex ion Ag(S2O3)23- forms? The Ksp for AgCl is 1.8 × 10-10 and the Kf for Ag(S2O3)23- is 2.9 × 1013.

Accepted Answer

A) 0.50 M 
B) 1.0 M 
C) 1.5 M 
D) 2.0 M 
A) 0.50 M 
B) 1.0 M 
C) 1.5 M 
D) 2.0 M

Question 5

Calculate the molar solubility of thallium(I)chloride in 0.20 M NaCl at 25°C.Ksp for TlCl is 1.7 × 10-4.

Accepted Answer

A) 3.4 × 10-5 M 
B) 8.5 × 10-4 M 
C) 5.8 × 10-3 M 
D) 1.3 × 10-2 M 
A) 3.4 × 10-5 M 
B) 8.5 × 10-4 M 
C) 5.8 × 10-3 M 
D) 1.3 × 10-2 M

Question 6

What is the silver ion concentration for a saturated solution of SrF2 if the Ksp for SrF2 is

Accepted Answer

A) 9.3 × 10-7 M 
B) 1.4 × 10-3 M 
C) 8.5 × 10-4 M 
D) 4.06 × 10-4 M 
A) 9.3 × 10-7 M 
B) 1.4 × 10-3 M 
C) 8.5 × 10-4 M 
D) 4.06 × 10-4 M

Question 7

The following pictures represent solutions of AgCl,which may also contain ions other than AgS1U1P1+S1S1P0 and ClS1U1P1-S1S1P0 which are not shown.Gray spheres represent AgS1U1P1+S1S1P0 ions and dotted spheres represent ClS1U1P1-S1S1P0 ions.  
-If solution (1)is a saturated solution of AgCl,which of solutions (1)-(4)represents the solution after a small amount of NH3 is added and equilibrium is restored?

Accepted Answer

A) (1) 
B) (2) 
C) (3) 
D) (4) 
A) (1) 
B) (2) 
C) (3) 
D) (4)

Question 8

What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.Ka = 1.8 × 10-5 for CH3CO2H.

Accepted Answer

A) 5.28 
B) 7.00 
C) 8.72 
D) 10.02 
A) 5.28 
B) 7.00 
C) 8.72 
D) 10.02

Question 9

The following pictures represent solutions of CaCOS1U1B13S1U1B0,which may also contain ions other than CaS1U1P12+S1S1P0 and COS1U1B13S1U1B0S1U1P12-S1S1P0 which are not shown.Gray spheres represent CaS1U1P12+S1S1P0 ions and unshaded spheres represent COS1U1B13S1U1B0S1U1P12-S1S1P0 ions.  
-If solution (1)is a saturated solution of CaCO3,which of solutions (1)-(4)represents the solution after a small amount of NaOH is added and equilibrium is restored?

Accepted Answer

A) (1) 
B) (2) 
C) (3) 
D) (4) 
A) (1) 
B) (2) 
C) (3) 
D) (4)

Question 10

Which of the following buffer solutions will exhibit the highest pH?

Accepted Answer

A) 0.100 M NH3 with 0.100 M NH4+ 
B) 0.200 M NH3 with 0.100 M NH4+ 
C) 0.200 M NH3 with 0.0400M NH4+ 
D) 0.800 M NH3 with 0.800 M NH4+ 
A) 0.100 M NH3 with 0.100 M NH4+ 
B) 0.200 M NH3 with 0.100 M NH4+ 
C) 0.200 M NH3 with 0.0400M NH4+ 
D) 0.800 M NH3 with 0.800 M NH4+

Question 11

Sodium hypochlorite,NaOCl,is the active ingredient in household bleach.What is the concentration of hypochlorite ion if 20.00 mL of bleach requires 28.30 mL of 0.500 M HCl to reach the equivalence point?

Accepted Answer

A) 0.208 M 
B) 0.353 M 
C) 0.708 M 
D) 1.21 M 
A) 0.208 M 
B) 0.353 M 
C) 0.708 M 
D) 1.21 M

Question 12

The following pictures represent solutions of AgCl,which may also contain ions other than AgS1U1P1+S1S1P0 and ClS1U1P1-S1S1P0 which are not shown.Gray spheres represent AgS1U1P1+S1S1P0 ions and dotted spheres represent ClS1U1P1-S1S1P0 ions.  
-If solution (1)is a saturated solution of AgCl,which of solutions (1)-(4)represents the solution after a small amount of HNO3 is added and equilibrium is restored?

Accepted Answer

A) (1) 
B) (2) 
C) (3) 
D) (4) 
A) (1) 
B) (2) 
C) (3) 
D) (4)

Question 13

The neutralization constant Kn for the neutralization of phenobarbital (C12H12N2O3)and morphine (C17H19NO3)is 2.9.The acid dissociation constant Ka for phenobarbital is 3.9 × 10-8.What is the base dissociation constant Kb for morphine?

Accepted Answer

A) 1.3 × 10-22 
B) 6.3 × 10-23 
C) 7.4 × 10-7 
D) 1.1 × 107 
A) 1.3 × 10-22 
B) 6.3 × 10-23 
C) 7.4 × 10-7 
D) 1.1 × 107

Question 14

What is the approximate value of the equilibrium constant,Kn,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The Kb for pyridine is 1.8 × 10-9. HCl(aq)+ C5H5N(aq)⇌ C5H5NHCl(aq)

Accepted Answer

A) 5.6 × 10-10 
B) 5.6 × 10-6 
C) 1.8 × 105 
D) 5.6 × 108 
A) 5.6 × 10-10 
B) 5.6 × 10-6 
C) 1.8 × 105 
D) 5.6 × 108

Question 15

The following pictures represent solutions of CaCOS1U1B13S1U1B0,which may also contain ions other than CaS1U1P12+S1S1P0 and COS1U1B13S1U1B0S1U1P12-S1S1P0 which are not shown.Gray spheres represent CaS1U1P12+S1S1P0 ions and unshaded spheres represent COS1U1B13S1U1B0S1U1P12-S1S1P0 ions.  
-If solution (1)is a saturated solution of CaCO3,which of solutions (1)-(4)represents the solution after a small amount of HNO3 is added and equilibrium is restored?

Accepted Answer

A) (1) 
B) (2) 
C) (3) 
D) (4) 
A) (1) 
B) (2) 
C) (3) 
D) (4)

Question 16

The following pictures represent solutions of CuS,which may also contain ions other than CuS1U1P12+S1S1P0 and SS1U1P12-S1S1P0 which are not shown.Gray spheres represent CuS1U1P12+S1S1P0 ions and dotted spheres represent SS1U1P12-S1S1P0 ions.  
-If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are unsaturated?

Accepted Answer

A) only (2) 
B) only (3) 
C) only (4) 
D) (3)and (4) 
A) only (2) 
B) only (3) 
C) only (4) 
D) (3)and (4)

Question 17

Barium hydroxide is slightly soluble in water,with a Ksp of 5.00 × 10-4 at 298K.The dissolution of barium hydroxide in water is an endothermic process. Ba+2 (aq)+ 2OH- (aq)
Which of the following will increase the solubility?

Accepted Answer

A) Barium hydroxide is added to the solution. 
B) Sodium hydroxide (NaOH)is added to the solution. 
C) The temperature is decreased. 
D) HCl is added to the mixture.(HCl reacts with OH-,removing it from the system. ) 
A) Barium hydroxide is added to the solution. 
B) Sodium hydroxide (NaOH)is added to the solution. 
C) The temperature is decreased. 
D) HCl is added to the mixture.(HCl reacts with OH-,removing it from the system. )

Question 18

Sulfurous acid,H2SO3 has acid dissociation constants Ka1 = 1.5 × 10-2 and Ka2 = 6.3 × 10-8.What is the pH after 10.00 mL of 0.1000 M NaOH is added to 10.00 mL of 0.1000 M H2SO3?

Accepted Answer

A) 1.82 
B) 3.60 
C) 4.25 
D) 7.20 
A) 1.82 
B) 3.60 
C) 4.25 
D) 7.20

Question 19

Calculate the pH of the solution when 0.035 moles of OH- have been added to a 2.0 L containing equal amounts of 0.10 M acetic acid and 0.10 M sodium acetate.(pKa of acetic acid is 4.76)

Accepted Answer

A) 5.08 
B) 4.91 
C) 4.89 
D) 4.83 
A) 5.08 
B) 4.91 
C) 4.89 
D) 4.83

Question 20

The equivalence point pH of the titration of four weak bases is given.Which is the strongest base?

Accepted Answer

A) 4.20 
B) 6.10 
C) 6.40 
D) 7.90 
A) 4.20 
B) 6.10 
C) 6.40 
D) 7.90

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents pK_a1?

0.10 M potassium chromate is slowly added to a solution containing 0.20 M AgNO₃ and 0.20 M Ba(NO₃)₂.What is the Ag⁺ concentration when BaCrO₄ just starts to precipitate? K_sp for Ag₂CrO₄ and BaCrO₄ are 1.1 × 10^-12 and 1.2 × 10^-10,respectively.

What is the molar solubility of AgCl in 1.0 M K₂S₂O₃ if the complex ion Ag(S₂O₃)₂^3- forms? The Ksp for AgCl is 1.8 × 10^-10 and the K_f for Ag(S₂O₃)₂^3- is 2.9 × 10¹³.

Calculate the molar solubility of thallium(I)chloride in 0.20 M NaCl at 25°C.K_sp for TlCl is 1.7 × 10^-4.

What is the silver ion concentration for a saturated solution of SrF₂ if the K_sp for SrF₂ is

What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.K_a = 1.8 × 10^-5for CH₃CO₂H.

Which of the following buffer solutions will exhibit the highest pH?

Sodium hypochlorite,NaOCl,is the active ingredient in household bleach.What is the concentration of hypochlorite ion if 20.00 mL of bleach requires 28.30 mL of 0.500 M HCl to reach the equivalence point?

The neutralization constant K_n for the neutralization of phenobarbital (C₁₂H₁₂N₂O₃)and morphine (C₁₇H₁₉NO₃)is 2.9.The acid dissociation constant K_a for phenobarbital is 3.9 × 10^-8.What is the base dissociation constant K_b for morphine?

What is the approximate value of the equilibrium constant,K_n,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The K_b for pyridine is 1.8 × 10^-9. HCl(aq)+ C₅H₅N(aq)⇌ C₅H₅NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu²⁺ and S^2- which are not shown.Gray spheres represent Cu²⁺ ions and dotted spheres represent S^2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are unsaturated?

Barium hydroxide is slightly soluble in water,with a K_sp of 5.00 × 10^-4 at 298K.The dissolution of barium hydroxide in water is an endothermic process. Ba⁺²(aq)+ 2OH^-(aq) Which of the following will increase the solubility?

Sulfurous acid,H₂SO₃ has acid dissociation constants K_a1 = 1.5 × 10^-2 and K_a2 = 6.3 × 10^-8.What is the pH after 10.00 mL of 0.1000 M NaOH is added to 10.00 mL of 0.1000 M H₂SO₃?

Calculate the pH of the solution when 0.035 moles of OH^- have been added to a 2.0 L containing equal amounts of 0.10 M acetic acid and 0.10 M sodium acetate.(pKa of acetic acid is 4.76)

The equivalence point pH of the titration of four weak bases is given.Which is the strongest base?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

Exam 16: Applications of Aqueous Equilibria

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H2A with NaOH. -Which point a-d represents pKa1?

0.10 M potassium chromate is slowly added to a solution containing 0.20 M AgNO3 and 0.20 M Ba(NO3)2.What is the Ag+ concentration when BaCrO4 just starts to precipitate? Ksp for Ag2CrO4 and BaCrO4 are 1.1 × 10-12 and 1.2 × 10-10,respectively.

What is the molar solubility of AgCl in 1.0 M K2S2O3 if the complex ion Ag(S2O3)23- forms? The Ksp for AgCl is 1.8 × 10-10 and the Kf for Ag(S2O3)23- is 2.9 × 1013.

Calculate the molar solubility of thallium(I)chloride in 0.20 M NaCl at 25°C.Ksp for TlCl is 1.7 × 10-4.

What is the silver ion concentration for a saturated solution of SrF2 if the Ksp for SrF2 is

What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.Ka = 1.8 × 10-5 for CH3CO2H.

Which of the following buffer solutions will exhibit the highest pH?

Sodium hypochlorite,NaOCl,is the active ingredient in household bleach.What is the concentration of hypochlorite ion if 20.00 mL of bleach requires 28.30 mL of 0.500 M HCl to reach the equivalence point?

The neutralization constant Kn for the neutralization of phenobarbital (C12H12N2O3)and morphine (C17H19NO3)is 2.9.The acid dissociation constant Ka for phenobarbital is 3.9 × 10-8.What is the base dissociation constant Kb for morphine?

What is the approximate value of the equilibrium constant,Kn,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The Kb for pyridine is 1.8 × 10-9. HCl(aq)+ C5H5N(aq)⇌ C5H5NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu2+ and S2- which are not shown.Gray spheres represent Cu2+ ions and dotted spheres represent S2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are unsaturated?

Barium hydroxide is slightly soluble in water,with a Ksp of 5.00 × 10-4 at 298K.The dissolution of barium hydroxide in water is an endothermic process. Ba+2 (aq)+ 2OH- (aq) Which of the following will increase the solubility?

Sulfurous acid,H2SO3 has acid dissociation constants Ka1 = 1.5 × 10-2 and Ka2 = 6.3 × 10-8.What is the pH after 10.00 mL of 0.1000 M NaOH is added to 10.00 mL of 0.1000 M H2SO3?

Calculate the pH of the solution when 0.035 moles of OH- have been added to a 2.0 L containing equal amounts of 0.10 M acetic acid and 0.10 M sodium acetate.(pKa of acetic acid is 4.76)

The equivalence point pH of the titration of four weak bases is given.Which is the strongest base?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents pK_a1?

0.10 M potassium chromate is slowly added to a solution containing 0.20 M AgNO₃ and 0.20 M Ba(NO₃)₂.What is the Ag⁺ concentration when BaCrO₄ just starts to precipitate? K_sp for Ag₂CrO₄ and BaCrO₄ are 1.1 × 10^-12 and 1.2 × 10^-10,respectively.

What is the molar solubility of AgCl in 1.0 M K₂S₂O₃ if the complex ion Ag(S₂O₃)₂^3- forms? The Ksp for AgCl is 1.8 × 10^-10 and the K_f for Ag(S₂O₃)₂^3- is 2.9 × 10¹³.

Calculate the molar solubility of thallium(I)chloride in 0.20 M NaCl at 25°C.K_sp for TlCl is 1.7 × 10^-4.

What is the silver ion concentration for a saturated solution of SrF₂ if the K_sp for SrF₂ is

What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.K_a = 1.8 × 10^-5for CH₃CO₂H.

The neutralization constant K_n for the neutralization of phenobarbital (C₁₂H₁₂N₂O₃)and morphine (C₁₇H₁₉NO₃)is 2.9.The acid dissociation constant K_a for phenobarbital is 3.9 × 10^-8.What is the base dissociation constant K_b for morphine?

What is the approximate value of the equilibrium constant,K_n,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The K_b for pyridine is 1.8 × 10^-9. HCl(aq)+ C₅H₅N(aq)⇌ C₅H₅NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu²⁺ and S^2- which are not shown.Gray spheres represent Cu²⁺ ions and dotted spheres represent S^2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are unsaturated?

Barium hydroxide is slightly soluble in water,with a K_sp of 5.00 × 10^-4 at 298K.The dissolution of barium hydroxide in water is an endothermic process. Ba⁺²(aq)+ 2OH^-(aq) Which of the following will increase the solubility?

Sulfurous acid,H₂SO₃ has acid dissociation constants K_a1 = 1.5 × 10^-2 and K_a2 = 6.3 × 10^-8.What is the pH after 10.00 mL of 0.1000 M NaOH is added to 10.00 mL of 0.1000 M H₂SO₃?

Calculate the pH of the solution when 0.035 moles of OH^- have been added to a 2.0 L containing equal amounts of 0.10 M acetic acid and 0.10 M sodium acetate.(pKa of acetic acid is 4.76)