Question 1

What is the resulting pH if 10 millimoles of HCl is added to 1 liter of a 0.1 M phosphate buffer at pH 7.00 (pK=6.82)?

Accepted Answer

A)  6.82 
B)  6.98 
C)  7.01 
D)  7.19 
E)  cannot be determined 
A)  6.82 
B)  6.98 
C)  7.01 
D)  7.19 
E)  cannot be determined

Question 2

Which of the following molecules would be prevented from readily crossing a lipid bilayer?

Accepted Answer

A)  glucose 
B)  sodium ions 
C)  potassium ions 
D)  water 
E)  all of the above 
A)  glucose 
B)  sodium ions 
C)  potassium ions 
D)  water 
E)  all of the above

Question 3

If 1.0 mL of 1.0 M acetic acid (pK = 4.76, K = 1.74 x 10-5) was added to one liter of pure water, what is the resulting pH?

Accepted Answer

A)  1.0 
B)  1.3 
C)  3.0 
D)  3.9 
E)  10.1 
A)  1.0 
B)  1.3 
C)  3.0 
D)  3.9 
E)  10.1

Question 4

What term is used to describe the exclusion of nonpolar substances from an aqueous solution?

Accepted Answer

A)  nonpolar effect 
B)  lipid effect 
C)  hydrophobic effect 
D)  oil droplet effect 
E)  amphiphilic effect 
A)  nonpolar effect 
B)  lipid effect 
C)  hydrophobic effect 
D)  oil droplet effect 
E)  amphiphilic effect

Question 5

During metabolic acidosis, ___ ventilation excretes acid in the form of ___.

Accepted Answer

The answer of During metabolic acidosis, ___ ventilation excretes acid...

Question 6

What is the [H+] of an aqueous solution with a pH of 6.2?

Accepted Answer

A)  6.2 * -6 
B)  1.6 * 10-8 
C)  6.3 * 10-7 
D)  3. 3 * 10-5 
E)  none of the above 
A)  6.2 * -6 
B)  1.6 * 10-8 
C)  6.3 * 10-7 
D)  3. 3 * 10-5 
E)  none of the above

Question 7

Fatty acid anions most commonly assemble into _____ in aqueous solution.

Accepted Answer

A)  lipid bilayers 
B)  solvent-filled vesicles 
C)  micelles 
D)  liposomes 
E)  none of the above 
A)  lipid bilayers 
B)  solvent-filled vesicles 
C)  micelles 
D)  liposomes 
E)  none of the above

Question 8

Which of the following explains the attractive forces between hydrophobic molecules in an aqueous solution?

Accepted Answer

A)  in an aqueous environment, London dispersion forces between hydrophobic molecules become stronger 
B)  in an aqueous environment, London dispersion forces between hydrophobic molecules and water become stronger 
C)  since nonpolar molecules do not form hydrogen bonds with hydrogen bonds with water, they can form hydrogen bonds with other nonpolar molecules 
D)  there is no increase in attractive forces between nonpolar molecules in an aqueous environment 
E)  none of the above 
A)  in an aqueous environment, London dispersion forces between hydrophobic molecules become stronger 
B)  in an aqueous environment, London dispersion forces between hydrophobic molecules and water become stronger 
C)  since nonpolar molecules do not form hydrogen bonds with hydrogen bonds with water, they can form hydrogen bonds with other nonpolar molecules 
D)  there is no increase in attractive forces between nonpolar molecules in an aqueous environment 
E)  none of the above

Question 9

Which of the following could be used to formulate 100 mls of a 0.10 M phosphate buffer (pK=6.82) at pH 7.2?

Accepted Answer

A)  2.9 mmoles of Na2HPO4 and 7.1 mmoles of NaHPO4 
B)  10 mmoles of Na2HPO4 and 7.1 mmoles of NaOH 
C)  10 mmoles of NaHPO4 and 7.1 mmoles of HCl 
D)  10 mmoles of H3PO4 and 17.1 mmoles of NaOH 
E)  all of the above 
A)  2.9 mmoles of Na2HPO4 and 7.1 mmoles of NaHPO4 
B)  10 mmoles of Na2HPO4 and 7.1 mmoles of NaOH 
C)  10 mmoles of NaHPO4 and 7.1 mmoles of HCl 
D)  10 mmoles of H3PO4 and 17.1 mmoles of NaOH 
E)  all of the above

Question 10

During vigorous exercise, hydrogen ions are produced within cells as a result of increased metabolism. What component of the intracellular buffer would increase as a result of the increased H+ production?

Accepted Answer

A)  H3PO4 
B)  H2PO4- 
C)  HPO42- 
D)  PO43- 
E)  none of the above 
A)  H3PO4 
B)  H2PO4- 
C)  HPO42- 
D)  PO43- 
E)  none of the above

Question 11

When a non-polar substance is added to water, how do the molecules of water behave?

Accepted Answer

A)  the regular hydrogen bond pattern is disrupted resulting in a decrease of entropy 
B)  the regular hydrogen bond pattern is disrupted resulting in an increase of entropy 
C)  the regular hydrogen bond pattern is disrupted resulting in a decrease of enthalpy 
D)  the regular hydrogen bond pattern is disrupted resulting in an increase of enthalpy 
E)  none of the above 
A)  the regular hydrogen bond pattern is disrupted resulting in a decrease of entropy 
B)  the regular hydrogen bond pattern is disrupted resulting in an increase of entropy 
C)  the regular hydrogen bond pattern is disrupted resulting in a decrease of enthalpy 
D)  the regular hydrogen bond pattern is disrupted resulting in an increase of enthalpy 
E)  none of the above

What is the resulting pH if 10 millimoles of HCl is added to 1 liter of a 0.1 M phosphate buffer at pH 7.00 (pK=6.82)?

Which of the following molecules would be prevented from readily crossing a lipid bilayer?

If 1.0 mL of 1.0 M acetic acid (pK = 4.76, K = 1.74 x 10^-5) was added to one liter of pure water, what is the resulting pH?

What term is used to describe the exclusion of nonpolar substances from an aqueous solution?

During metabolic acidosis, _ ventilation excretes acid in the form of _.

What is the [H⁺] of an aqueous solution with a pH of 6.2?

Fatty acid anions most commonly assemble into _____ in aqueous solution.

Which of the following explains the attractive forces between hydrophobic molecules in an aqueous solution?

Which of the following could be used to formulate 100 mls of a 0.10 M phosphate buffer (pK=6.82) at pH 7.2?

During vigorous exercise, hydrogen ions are produced within cells as a result of increased metabolism. What component of the intracellular buffer would increase as a result of the increased H⁺ production?

When a non-polar substance is added to water, how do the molecules of water behave?

The Chemical Basis of Life

Nucleic Acid Structure and Function

Protein Structure

Protein Function

How Enzymes Work

Enzyme Kinetics and Inhibition

Lipids and Membranes

Membrane Transport

Signaling

Carbohydrates

Metabolism and Bioenergetics

Glucose Metabolism

The Citric Acid Cycle

Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Nitrogen Metabolism

Regulation of Mammalian Fuel Metabolism

DNA Replication and Repair

Transcription and RNA

Protein Synthesis

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Exam 2: Aqueous Chemistry

What is the resulting pH if 10 millimoles of HCl is added to 1 liter of a 0.1 M phosphate buffer at pH 7.00 (pK=6.82)?

Which of the following molecules would be prevented from readily crossing a lipid bilayer?

If 1.0 mL of 1.0 M acetic acid (pK = 4.76, K = 1.74 x 10-5) was added to one liter of pure water, what is the resulting pH?

What term is used to describe the exclusion of nonpolar substances from an aqueous solution?

During metabolic acidosis, ___ ventilation excretes acid in the form of ___.

What is the [H+] of an aqueous solution with a pH of 6.2?

Fatty acid anions most commonly assemble into _____ in aqueous solution.

Which of the following explains the attractive forces between hydrophobic molecules in an aqueous solution?

Which of the following could be used to formulate 100 mls of a 0.10 M phosphate buffer (pK=6.82) at pH 7.2?

During vigorous exercise, hydrogen ions are produced within cells as a result of increased metabolism. What component of the intracellular buffer would increase as a result of the increased H+ production?

When a non-polar substance is added to water, how do the molecules of water behave?

The Chemical Basis of Life

Nucleic Acid Structure and Function

Protein Structure

Protein Function

How Enzymes Work

Enzyme Kinetics and Inhibition

Lipids and Membranes

Membrane Transport

Signaling

Carbohydrates

Metabolism and Bioenergetics

Glucose Metabolism

The Citric Acid Cycle

Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Nitrogen Metabolism

Regulation of Mammalian Fuel Metabolism

DNA Replication and Repair

Transcription and RNA

Protein Synthesis

Filters

If 1.0 mL of 1.0 M acetic acid (pK = 4.76, K = 1.74 x 10^-5) was added to one liter of pure water, what is the resulting pH?

During metabolic acidosis, _ ventilation excretes acid in the form of _.

What is the [H⁺] of an aqueous solution with a pH of 6.2?

During vigorous exercise, hydrogen ions are produced within cells as a result of increased metabolism. What component of the intracellular buffer would increase as a result of the increased H⁺ production?