Question 1

Which of the following strong acids is found in the body?

Accepted Answer

A)  HNO3 
B)  HCl 
C)  H?2SO4 
D)  HClO4 
E)  HBr 
A)  HNO3 
B)  HCl 
C)  H?2SO4 
D)  HClO4 
E)  HBr

Question 2

The concentration of H3O+ in a solution is 1 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F104 M. Which of the following statements describes how the concentration of -OH in the solution could be determined?

Accepted Answer

A)  It is not possible to determine [F1F1F1S1F1F1F10OH]. 
B)  Calculate pH 
C)  Measure the pH with a pH probe or dipstick 
D)  Solve for [F1F1F1S1F1F1F10OH] using the ion-product constant equation 
E)  The [F1F1F1S1F1F1F10OH] is unchanged when an acid is added to a solution. 
A)  It is not possible to determine [F1F1F1S1F1F1F10OH]. 
B)  Calculate pH 
C)  Measure the pH with a pH probe or dipstick 
D)  Solve for [F1F1F1S1F1F1F10OH] using the ion-product constant equation 
E)  The [F1F1F1S1F1F1F10OH] is unchanged when an acid is added to a solution.

Question 3

An alkene has a pKa of 40, while an alkyne has a pKa of 25. Which functional group is more acidic?

Accepted Answer

A)  an alkyne, because it has a higher pKa 
B)  an alkyne, because it has a lower pKa 
C)  an alkene, because it has a higher pKa 
D)  an alkene, because it has a lower pKa 
E)  They have the same acidity. 
A)  an alkyne, because it has a higher pKa 
B)  an alkyne, because it has a lower pKa 
C)  an alkene, because it has a higher pKa 
D)  an alkene, because it has a lower pKa 
E)  They have the same acidity.

Question 4

According to the chart below, how are protons be excreted from the body?

Accepted Answer

A)  by sweating 
B)  by urinating and through sweating 
C)  by urinating only 
D)  by throwing up 
E)  by urinating, sweating, or throwing up 
A)  by sweating 
B)  by urinating and through sweating 
C)  by urinating only 
D)  by throwing up 
E)  by urinating, sweating, or throwing up

Question 5

What is the pH of a solution with a [H3O+] of 7.9 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F1011 M?

Accepted Answer

A)  "10.1" 
B)  "F1F1F1S1F1F1F1010.1" 
C)  "3.90" 
D)  "F1F1F1S1F1F1F103.90" 
E)  "11.9" 
A)  "10.1" 
B)  "F1F1F1S1F1F1F1010.1" 
C)  "3.90" 
D)  "F1F1F1S1F1F1F103.90" 
E)  "11.9"

Question 6

The [H3O+] of a solution with a pH of 2 is ______ the [H3O+] of a solution with a pH of 3.

Accepted Answer

A)  one-tenth 
B)  ten times 
C)  one-half 
D)  twice 
E)  the same as 
A)  one-tenth 
B)  ten times 
C)  one-half 
D)  twice 
E)  the same as

Question 7

Which of the following statements does NOT correctly describe pH?

Accepted Answer

A)  pH is a measure of acidity of a solution. 
B)  pH is a measure of hydronium concentration in a solution. 
C)  The higher the pH, the more acidic a solution. 
D)  A pH of 7 is a neutral solution. 
E)  pH = F1F1F1S1F1F1F10log [H3O+]. 
A)  pH is a measure of acidity of a solution. 
B)  pH is a measure of hydronium concentration in a solution. 
C)  The higher the pH, the more acidic a solution. 
D)  A pH of 7 is a neutral solution. 
E)  pH = F1F1F1S1F1F1F10log [H3O+].

Question 8

A hydrogen atom without an electron is referred to as

Accepted Answer

A)  hydroxide. 
B)  hydronium. 
C)  a proton. 
D)  an acid. 
E)  a conjugate base. 
A)  hydroxide. 
B)  hydronium. 
C)  a proton. 
D)  an acid. 
E)  a conjugate base.

Question 9

Which of the following reactions illustrate the reaction of a base? I. NH3 + H2O → +NH4 + F1F1F1S1F1F1F10OH
II) HCl + H2O → H3O+ + ClF1F1F1S1F1F1F10
III) NaOH → Na+ + F1F1F1S1F1F1F10OH
IV) +NH4 + H2O → H3O+ + NH3

Accepted Answer

A)  I only 
B)  II only 
C)  I and III 
D)  I, III, and IV 
E)  All of the above are reactions of a base. 
A)  I only 
B)  II only 
C)  I and III 
D)  I, III, and IV 
E)  All of the above are reactions of a base.

Question 10

According to the following table, what is the most acidic fluid in the body?

Accepted Answer

A)  gastric juice 
B)  sweat 
C)  urine 
D)  saliva 
E)  blood 
A)  gastric juice 
B)  sweat 
C)  urine 
D)  saliva 
E)  blood

Question 11

Which statement does NOT correctly explain why it is so important for intracellular pH to be maintained between 7.35 and 7.45?

Accepted Answer

A)  In this range, carboxylic acids, phosphate esters, and amines are ionized. 
B)  In this range, the molecules are trapped within the cell. 
C)  In this range, the concentration of biomolecules is high enough for key reactions to take place. 
D)  In this range, molecules in biochemical pathways can bind to enzymes appropriately. 
E)  In this range, molecules in biochemical pathways are inert. 
A)  In this range, carboxylic acids, phosphate esters, and amines are ionized. 
B)  In this range, the molecules are trapped within the cell. 
C)  In this range, the concentration of biomolecules is high enough for key reactions to take place. 
D)  In this range, molecules in biochemical pathways can bind to enzymes appropriately. 
E)  In this range, molecules in biochemical pathways are inert.

Question 12

Which of the following acidic functional groups is often involved in biochemical reactions in the body?

Accepted Answer

A)  HOF1F1F1S1F1F1F10 
B)  H2SO4 
C)  RCOOH 
D)  H3O+ 
E)  ROR 
A)  HOF1F1F1S1F1F1F10 
B)  H2SO4 
C)  RCOOH 
D)  H3O+ 
E)  ROR

Which of the following strong acids is found in the body?

The concentration of H₃O⁺ in a solution is 1  10^⁴M. Which of the following statements describes how the concentration of ^-OH in the solution could be determined?

An alkene has a pK_a of 40, while an alkyne has a pK_a of 25. Which functional group is more acidic?

According to the chart below, how are protons be excreted from the body?

What is the pH of a solution with a [H₃O⁺] of 7.9  10^¹¹ M?

The [H₃O⁺] of a solution with a pH of 2 is ______ the [H₃O⁺] of a solution with a pH of 3.

Which of the following statements does NOT correctly describe pH?

A hydrogen atom without an electron is referred to as

Which of the following reactions illustrate the reaction of a base? I. NH₃ + H₂O → ⁺NH₄ + ^OH II) HCl + H₂O → H₃O⁺ + Cl^ III) NaOH → Na⁺ + ^OH IV) ⁺NH₄+ H₂O → H₃O⁺ + NH₃

According to the following table, what is the most acidic fluid in the body?

Which statement does NOT correctly explain why it is so important for intracellular pH to be maintained between 7.35 and 7.45?

Which of the following acidic functional groups is often involved in biochemical reactions in the body?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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Exam 9: Acids and Bases

Which of the following strong acids is found in the body?

The concentration of H3O+ in a solution is 1  104 M. Which of the following statements describes how the concentration of -OH in the solution could be determined?

An alkene has a pKa of 40, while an alkyne has a pKa of 25. Which functional group is more acidic?

According to the chart below, how are protons be excreted from the body?

What is the pH of a solution with a [H3O+] of 7.9  1011 M?

The [H3O+] of a solution with a pH of 2 is ______ the [H3O+] of a solution with a pH of 3.

Which of the following statements does NOT correctly describe pH?

A hydrogen atom without an electron is referred to as

Which of the following reactions illustrate the reaction of a base? I. NH3 + H2O → +NH4 + OH II) HCl + H2O → H3O+ + Cl III) NaOH → Na+ + OH IV) +NH4 + H2O → H3O+ + NH3

According to the following table, what is the most acidic fluid in the body?

Which statement does NOT correctly explain why it is so important for intracellular pH to be maintained between 7.35 and 7.45?

Which of the following acidic functional groups is often involved in biochemical reactions in the body?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

The concentration of H₃O⁺ in a solution is 1  10^⁴M. Which of the following statements describes how the concentration of ^-OH in the solution could be determined?

An alkene has a pK_a of 40, while an alkyne has a pK_a of 25. Which functional group is more acidic?

What is the pH of a solution with a [H₃O⁺] of 7.9  10^¹¹ M?

The [H₃O⁺] of a solution with a pH of 2 is ______ the [H₃O⁺] of a solution with a pH of 3.

Which of the following reactions illustrate the reaction of a base? I. NH₃ + H₂O → ⁺NH₄ + ^OH II) HCl + H₂O → H₃O⁺ + Cl^ III) NaOH → Na⁺ + ^OH IV) ⁺NH₄+ H₂O → H₃O⁺ + NH₃