Question 1

Which of the following is a triprotic acid?

Accepted Answer

A)  HCl 
B)  HNO3 
C)  H2SO4 
D)  H3PO4 
A)  HCl 
B)  HNO3 
C)  H2SO4 
D)  H3PO4

Question 2

Which of the following is found in both baking soda and baking powder?

Accepted Answer

A)  NaHCO3(s) 
B)  KH2PO4(s) 
C)  both NaHCO3(s) and KH2PO4(s) 
D)  none of these 
A)  NaHCO3(s) 
B)  KH2PO4(s) 
C)  both NaHCO3(s) and KH2PO4(s) 
D)  none of these

Question 3

Which of the following is true of the bicarbonate ion (HCO3−)?

Accepted Answer

A)  It can only lose a proton. 
B)  It can only accept a proton. 
C)  It can either accept or lose a proton. 
D)  It can neither accept nor lose a proton. 
A)  It can only lose a proton. 
B)  It can only accept a proton. 
C)  It can either accept or lose a proton. 
D)  It can neither accept nor lose a proton.

Question 4

Which of the following is true of a buffer solution prepared by mixing equal concentrations of an acid and its conjugate base?

Accepted Answer

A)  The buffer capacity depends on the concentration of the acid and the base. 
B)  The pH of the solution is equal to the pKa of the conjugate base. 
C)  The buffer capacity depends on the concentration of the acid and the base, and the pH of the solution is equal to the pKa of the conjugate base. 
D)  None of these. 
A)  The buffer capacity depends on the concentration of the acid and the base. 
B)  The pH of the solution is equal to the pKa of the conjugate base. 
C)  The buffer capacity depends on the concentration of the acid and the base, and the pH of the solution is equal to the pKa of the conjugate base. 
D)  None of these.

Question 5

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

Question 6

In an aqueous solution, [H3O+] is 2.0 × 10−6 M. What is [OH−]?

Accepted Answer

A)  5.0 × 10−9 M 
B)  1.0 × 10−7 M 
C)  2.0 × 10− 6 M 
D)  1.0 × 108 M 
A)  5.0 × 10−9 M 
B)  1.0 × 10−7 M 
C)  2.0 × 10− 6 M 
D)  1.0 × 108 M

Question 7

Which of the following must be known while carrying out a titration?

Accepted Answer

A)  the concentrations of all the reactants 
B)  the stoichiometric ratio of the reactants 
C)  the concentrations of all the reactants and the stoichiometric ratio of the reactants 
D)  none of these 
A)  the concentrations of all the reactants 
B)  the stoichiometric ratio of the reactants 
C)  the concentrations of all the reactants and the stoichiometric ratio of the reactants 
D)  none of these

Question 8

What is the name of the acid that dissociates to give the cyanide ion, CN−?

Accepted Answer

A)  cyanic acid 
B)  cyanidic acid 
C)  cyanous 
D)  hydrocyanic acid 
A)  cyanic acid 
B)  cyanidic acid 
C)  cyanous 
D)  hydrocyanic acid

Question 9

Which of the following is the stronger base 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 10

Which of the following bases has the weakest conjugate acid?

Accepted Answer

A)  CH3COO− 
B)  C6H5O− 
C)  HSO4− 
D)  H2PO4− 
A)  CH3COO− 
B)  C6H5O− 
C)  HSO4− 
D)  H2PO4−

Question 11

Which of the following substances will react with an acid to produce a gas?

Accepted Answer

A)  NaOH(aq) 
B)  Na2CO3(aq) 
C)  both NaOH(aq) and Na2CO3(aq) 
D)  none of these 
A)  NaOH(aq) 
B)  Na2CO3(aq) 
C)  both NaOH(aq) and Na2CO3(aq) 
D)  none of these

Question 12

Lime (CaO) is insoluble in water. Which of the following substances will it dissolve in?

Accepted Answer

A)  HCl(aq) 
B)  NaOH(aq) 
C)  Ca(OH)2(aq) 
D)  none of these 
A)  HCl(aq) 
B)  NaOH(aq) 
C)  Ca(OH)2(aq) 
D)  none of these

Question 13

Which of the following species is present in the most important buffering system of human blood?

Accepted Answer

A)  CH3COO− 
B)  HCO3− 
C)  H2PO4− 
D)  HPO42− 
A)  CH3COO− 
B)  HCO3− 
C)  H2PO4− 
D)  HPO42−

Question 14

A solution has a pOH of 5.4. What is its pH?

Accepted Answer

A)  -8.6 
B)  -5.4 
C)  5.4 
D)  8.6 
A)  -8.6 
B)  -5.4 
C)  5.4 
D)  8.6

Question 15

Which of the following can be characterized as a strong electrolyte?

Accepted Answer

A)  0.001 M KOH 
B)  3.0 M KOH 
C)  both 0.001 M KOH and 3.0 M KOH 
D)  neither 0.001 M KOH or 3.0 M KOH 
A)  0.001 M KOH 
B)  3.0 M KOH 
C)  both 0.001 M KOH and 3.0 M KOH 
D)  neither 0.001 M KOH or 3.0 M KOH

Question 16

Which of the following can be characterized as a strong base?

Accepted Answer

A)  0.001 M KOH 
B)  3.0 M NH3 
C)  both 0.001 M KOH and 3.0 M NH3 
D)  neither 0.001 M KOH or 3.0 M NH3 
A)  0.001 M KOH 
B)  3.0 M NH3 
C)  both 0.001 M KOH and 3.0 M NH3 
D)  neither 0.001 M KOH or 3.0 M NH3

Question 17

Which of the following is the correct set of products formed when a strong acid reacts with a bicarbonate?

Accepted Answer

A)  salt and water 
B)  carbon dioxide and water 
C)  salt and hydrogen 
D)  carbon dioxide and hydrogen 
A)  salt and water 
B)  carbon dioxide and water 
C)  salt and hydrogen 
D)  carbon dioxide and hydrogen

Question 18

Which of the following is always true of a buffer prepared using equal concentrations of an acid and its conjugate base?

Accepted Answer

A)  pH = 7 
B)  pH = pKa 
C)  pH > 7 
D)  none of these 
A)  pH = 7 
B)  pH = pKa 
C)  pH > 7 
D)  none of these

Question 19

Examine the following image.   How would the solution in the beaker be classified?

Accepted Answer

A)  basic 
B)  acidic 
C)  neutral 
A)  basic 
B)  acidic 
C)  neutral

Question 20

Examine the following image.   Which of the following pH values would be about 100 times more acidic than the pH shown in the image?

Accepted Answer

A)  2.33 
B)  6.33 
C)  0.33 
D)  4.43 
E)  none of these 
A)  2.33 
B)  6.33 
C)  0.33 
D)  4.43 
E)  none of these

Exam 8: Acids and Bases

Which of the following is a triprotic acid?

Which of the following is found in both baking soda and baking powder?

Which of the following is true of the bicarbonate ion (HCO3−)?

Which of the following is true of a buffer solution prepared by mixing equal concentrations of an acid and its conjugate base?

Which of the following is true when comparing two acids?

In an aqueous solution, [H3O+] is 2.0 × 10−6 M. What is [OH−]?

Which of the following must be known while carrying out a titration?

What is the name of the acid that dissociates to give the cyanide ion, CN−?

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

Which of the following bases has the weakest conjugate acid?

Which of the following substances will react with an acid to produce a gas?

Lime (CaO) is insoluble in water. Which of the following substances will it dissolve in?

Which of the following species is present in the most important buffering system of human blood?

A solution has a pOH of 5.4. What is its pH?

Which of the following can be characterized as a strong electrolyte?

Which of the following can be characterized as a strong base?

Which of the following is the correct set of products formed when a strong acid reacts with a bicarbonate?

Which of the following is always true of a buffer prepared using equal concentrations of an acid and its conjugate base?

Examine the following image. How would the solution in the beaker be classified?

Examine the following image. Which of the following pH values would be about 100 times more acidic than the pH shown in the image?

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 true of the bicarbonate ion (HCO₃⁻)?

In an aqueous solution, [H₃O⁺] is 2.0 × 10⁻⁶ M. What is [OH⁻]?

What is the name of the acid that dissociates to give the cyanide ion, CN⁻?

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