Question 1

Which of the following is a diprotic 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 the Brønsted-Lowry definition of an acid?

Accepted Answer

A)  a hydroxide ion acceptor 
B)  a proton acceptor 
C)  a proton donor 
D)  none of these 
A)  a hydroxide ion acceptor 
B)  a proton acceptor 
C)  a proton donor 
D)  none of these

Question 3

Human blood contains which of the following buffers?

Accepted Answer

A)  HC2H3O2/C2H3O2- 
B)  H2PO4-/HPO42- 
C)  both a and b 
D)  neither a nor b 
A)  HC2H3O2/C2H3O2- 
B)  H2PO4-/HPO42- 
C)  both a and b 
D)  neither a nor b

Question 4

Human blood contains which of the following buffers?

Accepted Answer

A)  H2CO2/HCO3- 
B)  HC2H3O2/C2H3O2- 
C)  both a and b 
D)  neither a nor b 
A)  H2CO2/HCO3- 
B)  HC2H3O2/C2H3O2- 
C)  both a and b 
D)  neither a nor b

Question 5

Examine the activity series given below.  
-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

Question 6

Increasing which of the following will decrease 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 7

Which of the following is the conjugate base of water?

Accepted Answer

A)  H3O+ 
B)  NaOH 
C)  OH- 
D)  O2- 
A)  H3O+ 
B)  NaOH 
C)  OH- 
D)  O2-

Question 8

An acetic acid solution has a pH of 5.80, what is the [OH-] in this solution?

Accepted Answer

A)  1.6 × 10-20 M 
B)  6.3 × 10-9 M 
C)  1.6 × 10- 6 M 
D)  6.3 × 105 M 
A)  1.6 × 10-20 M 
B)  6.3 × 10-9 M 
C)  1.6 × 10- 6 M 
D)  6.3 × 105 M

Question 9

Given the following information determine which of these acids is the weakest? Ka for boric acid is 7.3 × 10-10
pKa of acetic acid is 4.75
Ka for lactic acid is 8.4 × 10-4
PKa of phenol is 9.89

Accepted Answer

A)  acetic acid 
B)  formic acid 
C)  lactic acid 
D)  phenol 
A)  acetic acid 
B)  formic acid 
C)  lactic acid 
D)  phenol

Question 10

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

Question 11

A solution has a pH of 7.4 What is its pOH?

Accepted Answer

A)  -6.6 
B)  -7.4 
C)  7.4 
D)  6.6 
A)  -6.6 
B)  -7.4 
C)  7.4 
D)  6.6

Question 12

Ions produced from which of the following acids play an important role in biochemistry?

Accepted Answer

A)  acetic 
B)  boric 
C)  nitric 
D)  phosphoric 
A)  acetic 
B)  boric 
C)  nitric 
D)  phosphoric

Question 13

The indicator methyl orange is given its name for which of the following reasons?

Accepted Answer

A)  It is orange in acidic solutions. 
B)  It is orange in basic solutions. 
C)  It is orange in neutral solutions. 
D)  It changes color from red to yellow. 
A)  It is orange in acidic solutions. 
B)  It is orange in basic solutions. 
C)  It is orange in neutral solutions. 
D)  It changes color from red to yellow.

Question 14

Given the following information determine which of these acids is the strongest? Ka for boric acid is 7.3 × 10-10
pKa of acetic acid is 4.75
Ka for lactic acid is 8.4 × 10-4
PKa of phenol is 9.89

Accepted Answer

A)  acetic acid 
B)  formic acid 
C)  lactic acid 
D)  phenol 
A)  acetic acid 
B)  formic acid 
C)  lactic acid 
D)  phenol

Question 15

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

Accepted Answer

A)  Al(s) 
B)  Na2CO3(aq) 
C)  both a and b 
D)  neither a nor b 
A)  Al(s) 
B)  Na2CO3(aq) 
C)  both a and b 
D)  neither a nor b

Question 16

An ammonia solution has a pH of 8.30, what is the [H3O+] in this solution?

Accepted Answer

A)  5.0 × 10-23 M 
B)  2.0 × 10-6 M 
C)  5.0 × 10-9 M 
D)  2.0 × 108 M 
A)  5.0 × 10-23 M 
B)  2.0 × 10-6 M 
C)  5.0 × 10-9 M 
D)  2.0 × 108 M

Question 17

Which of the following is the numerical value of Kw for water at room temperature?

Accepted Answer

A)  1.0 × 10-14 
B)  1.0 × 10-7 
C)  1.0 × 107 
D)  1.0 × 1014 
A)  1.0 × 10-14 
B)  1.0 × 10-7 
C)  1.0 × 107 
D)  1.0 × 1014

Question 18

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 19

Which of the following is the conjugate acid of water?

Accepted Answer

A)  HCl 
B)  H3O+ 
C)  NH4+ 
D)  OH- 
A)  HCl 
B)  H3O+ 
C)  NH4+ 
D)  OH-

Question 20

What are the shortcomings of traditional simple buffers when they are used in biological systems?

Accepted Answer

A)  Their pH sometimes changes too much as temperature changed. 
B)  Their pH sometimes changes too much upon dilution. 
C)  They often pass through cell walls and affect the cell's chemistry. 
D)  all of the above 
A)  Their pH sometimes changes too much as temperature changed. 
B)  Their pH sometimes changes too much upon dilution. 
C)  They often pass through cell walls and affect the cell's chemistry. 
D)  all of the above

Exam 8: Acids and Bases

Which of the following is a diprotic acid?

Which of the following is the Brønsted-Lowry definition of an acid?

Human blood contains which of the following buffers?

Human blood contains which of the following buffers?

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

Increasing which of the following will decrease the pH of a buffer made using acetic acid and sodium acetate?

Which of the following is the conjugate base of water?

An acetic acid solution has a pH of 5.80, what is the [OH-] in this solution?

Given the following information determine which of these acids is the weakest? Ka for boric acid is 7.3 × 10-10 pKa of acetic acid is 4.75 Ka for lactic acid is 8.4 × 10-4 PKa of phenol is 9.89

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

A solution has a pH of 7.4 What is its pOH?

Ions produced from which of the following acids play an important role in biochemistry?

The indicator methyl orange is given its name for which of the following reasons?

Given the following information determine which of these acids is the strongest? Ka for boric acid is 7.3 × 10-10 pKa of acetic acid is 4.75 Ka for lactic acid is 8.4 × 10-4 PKa of phenol is 9.89

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

An ammonia solution has a pH of 8.30, what is the [H3O+] in this solution?

Which of the following is the numerical value of Kw for water at room temperature?

Which of the following bases has the weakest conjugate acid?

Which of the following is the conjugate acid of water?

What are the shortcomings of traditional simple buffers when they are used in biological systems?

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

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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

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Filters

Given the following information determine which of these acids is the weakest? K_a for boric acid is 7.3 × 10^-10pK_a of acetic acid is 4.75 K_a for lactic acid is 8.4 × 10^-4 PK_a of phenol is 9.89

Given the following information determine which of these acids is the strongest? K_a for boric acid is 7.3 × 10^-10pK_a of acetic acid is 4.75 K_a for lactic acid is 8.4 × 10^-4 PK_a of phenol is 9.89

An ammonia solution has a pH of 8.30, what is the [H₃O⁺] in this solution?

Which of the following is the numerical value of K_w for water at room temperature?