Question 1

Which of the following is the stronger acid in the acid-base equilibrium H3O+ + I− ⇋ H2O + HI?

Accepted Answer

A)  H3O+ 
B)  I− 
C)  H2O 
D)  HI 
A)  H3O+ 
B)  I− 
C)  H2O 
D)  HI

Question 2

A student doing a titration of HNO3 with sodium hydroxide wants to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

Accepted Answer

A)  The concentration of HNO3 reported will be too high. 
B)  The concentration of HNO3 reported will be too low. 
C)  The concentration of HNO3 will be reported correctly. 
D)  The experiment cannot be done at all. 
A)  The concentration of HNO3 reported will be too high. 
B)  The concentration of HNO3 reported will be too low. 
C)  The concentration of HNO3 will be reported correctly. 
D)  The experiment cannot be done at all.

Question 3

Which of the following is true of titrations?

Accepted Answer

A)  Titrations are used to determine the acidity of a solution. 
B)  Titrations are used to determine the basicity of a solution. 
C)  Titrations are used to determine the concentration of only acidic solutions. 
D)  Titrations are used to determine the concentration of both acidic and basic solutions. 
A)  Titrations are used to determine the acidity of a solution. 
B)  Titrations are used to determine the basicity of a solution. 
C)  Titrations are used to determine the concentration of only acidic solutions. 
D)  Titrations are used to determine the concentration of both acidic and basic solutions.

Question 4

Which factor do we use to determine the stronger acid when comparing the strengths of two weak acids?

Accepted Answer

A)  the formula weights of the acids 
B)  the numbers of protons that the acids can lose 
C)  the values of the acid dissociation constant 
D)  none of these 
A)  the formula weights of the acids 
B)  the numbers of protons that the acids can lose 
C)  the values of the acid dissociation constant 
D)  none of these

Question 5

In an aqueous solution, [H3O+] is 1.0 × 10−6 M. What is [OH−]?

Accepted Answer

A)  1.0 × 10−9 M 
B)  1.0 × 10−8 M 
C)  1.0 × 10−6 M 
D)  1.0 × 108 M 
A)  1.0 × 10−9 M 
B)  1.0 × 10−8 M 
C)  1.0 × 10−6 M 
D)  1.0 × 108 M

Question 6

In a particular titration experiment, a 25.0-mL sample of an unknown monoprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?

Accepted Answer

A)  0.120 M 
B)  0.167 M 
C)  0.240 M 
D)  0.333 M 
A)  0.120 M 
B)  0.167 M 
C)  0.240 M 
D)  0.333 M

Question 7

Which of the following species is not present in the solution when solid sodium hydroxide is dissolved in water?

Accepted Answer

A)  NaOH(aq) 
B)  Na+(aq) 
C)  OH−(aq) 
D)  None, they are all present. 
A)  NaOH(aq) 
B)  Na+(aq) 
C)  OH−(aq) 
D)  None, they are all present.

Question 8

Which of the following is true when comparing two acids?

Accepted Answer

A)  The stronger acid has the smaller Ka. 
B)  The stronger acid has the larger pKa. 
C)  The stronger acid has the smaller Ka and the larger pKa 
D)  None of these 
A)  The stronger acid has the smaller Ka. 
B)  The stronger acid has the larger pKa. 
C)  The stronger acid has the smaller Ka and the larger pKa 
D)  None of these

Question 9

Which of the following is true of the position of the equilibrium established when HCl is dissolved in water?

Accepted Answer

A)  It lies to the left as the weaker acid and the weaker base are present on the left. 
B)  It lies to the left as the stronger acid and the stronger base are present on the left. 
C)  It lies to the right as the weaker acid and the weaker base are present on the right. 
D)  It lies to the right as the stronger acid and the stronger base are present on the right. 
A)  It lies to the left as the weaker acid and the weaker base are present on the left. 
B)  It lies to the left as the stronger acid and the stronger base are present on the left. 
C)  It lies to the right as the weaker acid and the weaker base are present on the right. 
D)  It lies to the right as the stronger acid and the stronger base are present on the right.

Question 10

Which of the following is the correct expression for the Kw of water?

Accepted Answer

A)  [H3O+][OH−]/[H2O] 
B)  [H2O]/[ H3O+][OH−] 
C)  [H3O+][OH−]/[H2O]2 
D)  [H3O+][OH−] 
A)  [H3O+][OH−]/[H2O] 
B)  [H2O]/[ H3O+][OH−] 
C)  [H3O+][OH−]/[H2O]2 
D)  [H3O+][OH−]

Question 11

Examine the following image.   Which of the following substances might be present in the beaker?

Accepted Answer

A)  0.10 M HCl 
B)  0.10 M NH3 
C)  0.10 M KOH 
D)  none of these 
A)  0.10 M HCl 
B)  0.10 M NH3 
C)  0.10 M KOH 
D)  none of these

Question 12

Which of the following is true when comparing two acids?

Accepted Answer

A)  The stronger acid has the larger Ka. 
B)  The stronger acid has the larger pKa. 
C)  The stronger acid has the larger Ka and the larger pKa 
D)  None of these 
A)  The stronger acid has the larger Ka. 
B)  The stronger acid has the larger pKa. 
C)  The stronger acid has the larger Ka and the larger pKa 
D)  None of these

Question 13

Examine the activity series given below.   What are the products of the following reaction based on the given activity series? Cu(s) + 2H+(aq) →

Accepted Answer

A)  Cu2+ is the only product. 
B)  H2 is the only product. 
C)  H3O+ is the only product. 
D)  Both Cu2+ and H2 are the products. 
E)  No reaction occurs in this case. 
A)  Cu2+ is the only product. 
B)  H2 is the only product. 
C)  H3O+ is the only product. 
D)  Both Cu2+ and H2 are the products. 
E)  No reaction occurs in this case.

Question 14

Which of the following is the conjugate base of acetic acid (CH3COOH)?

Accepted Answer

A)  H3O+ 
B)  CH3COOH2+ 
C)  CH3COO− 
D)  OH− 
A)  H3O+ 
B)  CH3COOH2+ 
C)  CH3COO− 
D)  OH−

Question 15

Which of the following is true of pure water?

Accepted Answer

A)  [H3O+] −] 
B)  [H3O+] = [OH−] 
C)  [H3O+] > [OH−] 
D)  [H3O+][OH−] = 1 
A)  [H3O+] −] 
B)  [H3O+] = [OH−] 
C)  [H3O+] > [OH−] 
D)  [H3O+][OH−] = 1

Question 16

Which of the following acids is associated with metabolic acidosis?

Accepted Answer

A)  citric acid 
B)  formic acid 
C)  lactic acid 
D)  phosphoric acid 
A)  citric acid 
B)  formic acid 
C)  lactic acid 
D)  phosphoric acid

Question 17

Which of the following is the correct name for the ion H+?

Accepted Answer

A)  hydrogen ion 
B)  proton 
C)  hydrogen ion and proton 
D)  neither hydrogen ion or proton 
A)  hydrogen ion 
B)  proton 
C)  hydrogen ion and proton 
D)  neither hydrogen ion or proton

Question 18

Which of the following represents the correct set of major species that are present in the solution when acetic acid (CH3COOH) reacts with ammonia (NH3)?

Accepted Answer

A)  acetic acid, CH3COOH, and ammonia, NH3 
B)  acetic acid, CH3COOH, and ammonium ion, NH4+ 
C)  acetate ion, CH3COO−, and ammonia, NH3 
D)  acetate ion, CH3COO−, and ammonium ion, NH4+ 
A)  acetic acid, CH3COOH, and ammonia, NH3 
B)  acetic acid, CH3COOH, and ammonium ion, NH4+ 
C)  acetate ion, CH3COO−, and ammonia, NH3 
D)  acetate ion, CH3COO−, and ammonium ion, NH4+

Question 19

Which of the following buffers is present in human blood?

Accepted Answer

A)  HC2H3O2/C2H3O2− 
B)  H2PO4−/HPO42− 
C)  both HC2H3O2/C2H3O2- and H2PO4-/HPO42- 
D)  none of these 
A)  HC2H3O2/C2H3O2− 
B)  H2PO4−/HPO42− 
C)  both HC2H3O2/C2H3O2- and H2PO4-/HPO42- 
D)  none of these

Question 20

Which of the following situations is most desirable when carrying out a titration?

Accepted Answer

A)  The equivalence point is reached before the end point. 
B)  The equivalence point corresponds to the end point. 
C)  The equivalence point is reached after the end point. 
D)  All of these are equally acceptable. 
A)  The equivalence point is reached before the end point. 
B)  The equivalence point corresponds to the end point. 
C)  The equivalence point is reached after the end point. 
D)  All of these are equally acceptable.

Exam 8: Acids and Bases

Which of the following is the stronger acid in the acid-base equilibrium H3O+ + I− ⇋ H2O + HI?

A student doing a titration of HNO3 with sodium hydroxide wants to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

Which of the following is true of titrations?

Which factor do we use to determine the stronger acid when comparing the strengths of two weak acids?

In an aqueous solution, [H3O+] is 1.0 × 10−6 M. What is [OH−]?

In a particular titration experiment, a 25.0-mL sample of an unknown monoprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?

Which of the following species is not present in the solution when solid sodium hydroxide is dissolved in water?

Which of the following is true when comparing two acids?

Which of the following is true of the position of the equilibrium established when HCl is dissolved in water?

Which of the following is the correct expression for the Kw of water?

Examine the following image. Which of the following substances might be present in the beaker?

Which of the following is true when comparing two acids?

Examine the activity series given below. What are the products of the following reaction based on the given activity series? Cu(s) + 2H+(aq) →

Which of the following is the conjugate base of acetic acid (CH3COOH)?

Which of the following is true of pure water?

Which of the following acids is associated with metabolic acidosis?

Which of the following is the correct name for the ion H+?

Which of the following represents the correct set of major species that are present in the solution when acetic acid (CH3COOH) reacts with ammonia (NH3)?

Which of the following buffers is present in human blood?

Which of the following situations is most desirable when carrying out a titration?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

Which of the following is the stronger acid in the acid-base equilibrium H₃O⁺ + I⁻ ⇋ H₂O + HI?

A student doing a titration of HNO₃ with sodium hydroxide wants to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

In an aqueous solution, [H₃O⁺] is 1.0 × 10⁻⁶ M. What is [OH⁻]?

Which of the following is the correct expression for the K_w of water?

Examine the activity series given below. What are the products of the following reaction based on the given activity series? Cu(s) + 2H⁺(aq) →

Which of the following is the conjugate base of acetic acid (CH₃COOH)?

Which of the following is the correct name for the ion H⁺?

Which of the following represents the correct set of major species that are present in the solution when acetic acid (CH₃COOH) reacts with ammonia (NH₃)?