Question 1

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

Accepted Answer

A)  NaHCO3(s) 
B)  KH2PO4(s) 
C)  both a and b 
D)  neither a nor b 
A)  NaHCO3(s) 
B)  KH2PO4(s) 
C)  both a and b 
D)  neither a nor b

Question 2

As student doing a titration of HNO3 with sodium hydroxide wanted to use Clayton yellow as an indicator. Clayton yellow changes color at pH = 12.7. Which of the following will be true of this experiment?

Accepted Answer

A)  The concentration of HNO3 will be reported as too high. 
B)  The concentration of HNO3 will be reported as too low. 
C)  The concentration of HNO3 will be reported correctly. 
D)  The experiment cannot be done at all. 
A)  The concentration of HNO3 will be reported as too high. 
B)  The concentration of HNO3 will be reported as 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 will determine the pH of a buffer made using acetic acid and sodium acetate?

Accepted Answer

A)  the amount of water present 
B)  the [C2H3O2-] 
C)  the [HC2H3O2] 
D)  the ratio [C2H3O2-]/[HC2H3O2] 
A)  the amount of water present 
B)  the [C2H3O2-] 
C)  the [HC2H3O2] 
D)  the ratio [C2H3O2-]/[HC2H3O2]

Question 4

The pKa of TRIS is HEPES is 7.55. What is the pH of a buffer prepared by mixing 200. mL of 0.20 M HEPES in its acid form with 100. mL of 0.20 M HEPES in it basic form?

Accepted Answer

A)  6.55 
B)  7.25 
C)  7.85 
D)  8.55 
A)  6.55 
B)  7.25 
C)  7.85 
D)  8.55

Question 5

The equivalence point of a titration corresponds to which of the following?

Accepted Answer

A)  The point where equal volumes of acid and base have been used. 
B)  The point where the acid and base have been added in proper stoichiometric amounts. 
C)  the point where a pH indicator changes color 
D)  none of the above 
A)  The point where equal volumes of acid and base have been used. 
B)  The point where the acid and base have been added in proper stoichiometric amounts. 
C)  the point where a pH indicator changes color 
D)  none of the above

Question 6

Which of the following is not a base?

Accepted Answer

A)  HPO42- 
B)  OH- 
C)  NH3 
D)  None, they are all bases. 
A)  HPO42- 
B)  OH- 
C)  NH3 
D)  None, they are all bases.

Question 7

When comparing two acids which of the following is true?

Accepted Answer

A)  the stronger acid has the smaller Ka 
B)  the stronger acid has the larger pKa 
C)  both a and b 
D)  neither a nor b 
A)  the stronger acid has the smaller Ka 
B)  the stronger acid has the larger pKa 
C)  both a and b 
D)  neither a nor b

Question 8

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

Accepted Answer

A)  0.001 M HCl 
B)  3.0 M CH3COOH 
C)  both a and b 
D)  neither a nor b 
A)  0.001 M HCl 
B)  3.0 M CH3COOH 
C)  both a and b 
D)  neither a nor b

Question 9

An HCl solution has a pH of 3.10, what is the [H3O+] in this solution?

Accepted Answer

A)  7.9 × 10-18 M 
B)  1.3 × 10-11 M 
C)  7.9 × 10-4 M 
D)  1.3 × 103 M 
A)  7.9 × 10-18 M 
B)  1.3 × 10-11 M 
C)  7.9 × 10-4 M 
D)  1.3 × 103 M

Question 10

When comparing two acids which of the following is true?

Accepted Answer

A)  the stronger acid has the larger Ka 
B)  the stronger acid has the larger pKa 
C)  both a and b 
D)  neither a nor b 
A)  the stronger acid has the larger Ka 
B)  the stronger acid has the larger pKa 
C)  both a and b 
D)  neither a nor b

Question 11

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 12

Which of the following buffers will have the highest pH?

Accepted Answer

A)  a solution containing 0.20 M HC2H3O2 and 0.20 M NaC2H3O2 
B)  a solution containing 0.25 M HC2H3O2 and 0.15 M NaC2H3O2 
C)  a solution containing 0.15 M HC2H3O2 and 0.25 M NaC2H3O2 
D)  They all have the same pH. 
A)  a solution containing 0.20 M HC2H3O2 and 0.20 M NaC2H3O2 
B)  a solution containing 0.25 M HC2H3O2 and 0.15 M NaC2H3O2 
C)  a solution containing 0.15 M HC2H3O2 and 0.25 M NaC2H3O2 
D)  They all have the same pH.

Question 13

Which of the following is true of pH?

Accepted Answer

A)  It can be used to determine the chemical identity of an acid. 
B)  It is a measure of acid concentration. 
C)  It is a measure of acid strength. 
D)  It is a measure of the overall acidity. 
A)  It can be used to determine the chemical identity of an acid. 
B)  It is a measure of acid concentration. 
C)  It is a measure of acid strength. 
D)  It is a measure of the overall acidity.

Question 14

The actual reaction in a titration generally is carried out in which of the following pieces of glassware?

Accepted Answer

A)  a buret 
B)  an Erlenmeyer flask 
C)  a graduated cylinder 
D)  none of the above 
A)  a buret 
B)  an Erlenmeyer flask 
C)  a graduated cylinder 
D)  none of the above

Question 15

Which of the following statements best describes the acid/base relationship?

Accepted Answer

A)  As acid strengths increase conjugate base strengths increase. 
B)  As base strengths increase conjugate acid strengths decrease. 
C)  both a and b 
D)  neither a nor b 
A)  As acid strengths increase conjugate base strengths increase. 
B)  As base strengths increase conjugate acid strengths decrease. 
C)  both a and b 
D)  neither a nor b

Question 16

Which of the following pH's corresponds to a highly acidic solution?

Accepted Answer

A)  2.8 
B)  6.8 
C)  7.2 
D)  11.2 
A)  2.8 
B)  6.8 
C)  7.2 
D)  11.2

Question 17

Examine the activity series given below.  
-Examine the following image. Assume the solution in the beaker is a buffer solution.   If 0.01 mol of NaOH was added to this solution, the resulting pH might be which of the following values?

Accepted Answer

A)  2.13 
B)  6.14 
C)  4.23 
D)  4.43 
A)  2.13 
B)  6.14 
C)  4.23 
D)  4.43

Question 18

According to Arrhenius which species is associated with all bases?

Accepted Answer

A)  H3O+ 
B)  OH- 
C)  H2O 
D)  none of these 
A)  H3O+ 
B)  OH- 
C)  H2O 
D)  none of these

Question 19

Which of the following are the products of the reaction of a metallic oxide with an acid?

Accepted Answer

A)  a metallic ion + H2(g) 
B)  a metallic ion + H2O(l) 
C)  solid metal + H2(g) 
D)  solid metal + H2O(g) 
A)  a metallic ion + H2(g) 
B)  a metallic ion + H2O(l) 
C)  solid metal + H2(g) 
D)  solid metal + H2O(g)

Question 20

What type of reaction occurs when an acid reacts with an active metal?

Accepted Answer

A)  double displacement 
B)  neutralization 
C)  precipitation 
D)  redox 
A)  double displacement 
B)  neutralization 
C)  precipitation 
D)  redox

Exam 8: Acids and Bases

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

As student doing a titration of HNO3 with sodium hydroxide wanted to use Clayton yellow as an indicator. Clayton yellow changes color at pH = 12.7. Which of the following will be true of this experiment?

Which of the following will determine the pH of a buffer made using acetic acid and sodium acetate?

The pKa of TRIS is HEPES is 7.55. What is the pH of a buffer prepared by mixing 200. mL of 0.20 M HEPES in its acid form with 100. mL of 0.20 M HEPES in it basic form?

The equivalence point of a titration corresponds to which of the following?

Which of the following is not a base?

When comparing two acids which of the following is true?

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

An HCl solution has a pH of 3.10, what is the [H3O+] in this solution?

When comparing two acids which of the following is true?

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 buffers will have the highest pH?

Which of the following is true of pH?

The actual reaction in a titration generally is carried out in which of the following pieces of glassware?

Which of the following statements best describes the acid/base relationship?

Which of the following pH's corresponds to a highly acidic solution?

Examine the activity series given below. -Examine the following image. Assume the solution in the beaker is a buffer solution. If 0.01 mol of NaOH was added to this solution, the resulting pH might be which of the following values?

According to Arrhenius which species is associated with all bases?

Which of the following are the products of the reaction of a metallic oxide with an acid?

What type of reaction occurs when an acid reacts with an active metal?

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 and Alkynes

Benzene and Its Derivatives

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

As student doing a titration of HNO₃ with sodium hydroxide wanted to use Clayton yellow as an indicator. Clayton yellow changes color at pH = 12.7. Which of the following will be true of this experiment?

The pK_a of TRIS is HEPES is 7.55. What is the pH of a buffer prepared by mixing 200. mL of 0.20 M HEPES in its acid form with 100. mL of 0.20 M HEPES in it basic form?

An HCl solution has a pH of 3.10, what is the [H₃O⁺] in this solution?