Question 1

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the pH of the solution. Assume complete dissociation.

Accepted Answer

The answer of A solution of stomach acid contains 1.21...

Question 2

A is red, B is colorless, and C is yellow. Initially the system is in equilibrium and has an orange color.
   What color will the system become if it is heated?

Accepted Answer

The answer of A is red, B is colorless, and...

Question 3

A sample of orange juice has a pH of 3.44. Its [H3O+] is ___.

Accepted Answer

A)  5.4 x 10-1 M 
B)  3.6 x 10-4 M 
C)  1.8 x 10-5 
D)  2.7 x 10-3 
A)  5.4 x 10-1 M 
B)  3.6 x 10-4 M 
C)  1.8 x 10-5 
D)  2.7 x 10-3

Question 4

Calculate the pKa of water whose Ka is 1.8 x 10-16.

Accepted Answer

Question 5

The symptoms of alkalosis appear when blood serum pH is ___.

Accepted Answer

The answer of The symptoms of alkalosis appear when blood...

Question 6

Which of the following statements is true?

Accepted Answer

A)  The larger the Ka for an acid, the weaker the acid. 
B)  The smaller the pKa of an acid, the stronger the acid. 
C)  The larger the pKa of an acid, the stronger the acid. 
D)  The smaller the Ka, the stronger the acid. 
A)  The larger the Ka for an acid, the weaker the acid. 
B)  The smaller the pKa of an acid, the stronger the acid. 
C)  The larger the pKa of an acid, the stronger the acid. 
D)  The smaller the Ka, the stronger the acid.

Question 7

In the reaction:
  The conjugate acid of water is ___.

Accepted Answer

A)  HNO2 
B)  H2O 
C)  H3O+ 
D)  NO2- 
A)  HNO2 
B)  H2O 
C)  H3O+ 
D)  NO2-

Question 8

The conjugate base of the hydrogen sulfate ion (HSO4-) is ___.

Accepted Answer

Question 9

What is the [H3O+] of an antacid tablet solution with a pH of 8.32?

Accepted Answer

A)  4.8 x 10-9 M 
B)  5.7 x 10-9 M 
C)  2.4 x 10-7 M 
D)  1.2 x 10-6 M 
A)  4.8 x 10-9 M 
B)  5.7 x 10-9 M 
C)  2.4 x 10-7 M 
D)  1.2 x 10-6 M

Question 10

Which of the following is the conjugate base of the acid, carbonic acid?

Accepted Answer

A)  H2CO3 
B)  H2O 
C)  H3O+ 
D)  HCO3- 
A)  H2CO3 
B)  H2O 
C)  H3O+ 
D)  HCO3-

Question 11

Acids and bases can react with and damage many compounds that are vital to living organisms.

Accepted Answer

A) True 
 B)False

Question 12

When stress is applied to a system at equilibrium such that the equilibrium is disturbed, the reaction proceeds in the direction that counteracts the disturbance. This explanation best describes ___.

Accepted Answer

A)  Brønsted-Lowry concept 
B)  Ion-Ion attraction 
C)  Conjugate pair analysis 
D)  Le Châtelier's principle 
A)  Brønsted-Lowry concept 
B)  Ion-Ion attraction 
C)  Conjugate pair analysis 
D)  Le Châtelier's principle

Question 13

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the molarity of the solution. Assume complete dissociation.

Accepted Answer

The answer of A solution of stomach acid contains 1.21...

Question 14

The pH of blood is maintained at 7.35-7.45 by the following buffer system:
  The H2CO3 is produced by the reaction of CO2 with water according to the equation:
  When one exercises, there is increased cellular output of CO2. What effect will this have on the pH of the blood if the excess CO2 is not eliminated?

Accepted Answer

A)  The pH will increase. 
B)  The pH will decrease. 
C)  The pH will remain the same. 
D)  It is impossible to predict the effect. 
A)  The pH will increase. 
B)  The pH will decrease. 
C)  The pH will remain the same. 
D)  It is impossible to predict the effect.

Question 15

What is the concentration of [H3O+] in an aqueous solution when the [OH-] is 5.2 x 10-9 M?

Accepted Answer

A)  1.9 x 10-6 M 
B)  5.7 M 
C)  1.0 x 10-14 M 
D)  9.8 x 10-9 M 
A)  1.9 x 10-6 M 
B)  5.7 M 
C)  1.0 x 10-14 M 
D)  9.8 x 10-9 M

Question 16

Compounds that can act as acids and bases are called ___.

Accepted Answer

The answer of Compounds that can act as acids and...

Question 17

Write the equation illustrating how H2CO3 reacts as an acid with H2O.

Accepted Answer

Question 18

The carbonate/hydrogen carbonate buffer is responsible for maintaining the pH of human blood in a narrow range between 7.35-7.45. The following equation shows the equilibrium that exists between carbonic acid (H2CO3) and its conjugate base, hydrogen carbonate (HCO3-).
   In you own words, explain what happens when a solution containing hydroxide ions is added to the system and how the buffer prevents the pH from changing.

Accepted Answer

Added OH^- will react

Question 19

A sample of blood has a pH of 7.37, which means that the sample of blood is slightly ___.

Accepted Answer

The answer of A sample of blood has a pH...

Question 20

Calculate the pH of a 0.0019 M HNO3 solution.

Accepted Answer

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the pH of the solution. Assume complete dissociation.

A is red, B is colorless, and C is yellow. Initially the system is in equilibrium and has an orange color. What color will the system become if it is heated?

A sample of orange juice has a pH of 3.44. Its [H₃O⁺] is ___.

Calculate the pK_a of water whose K_ais 1.8 x 10^-16.

The symptoms of alkalosis appear when blood serum pH is ___.

Which of the following statements is true?

In the reaction: The conjugate acid of water is ___.

The conjugate base of the hydrogen sulfate ion (HSO₄^-) is ___.

What is the [H₃O⁺] of an antacid tablet solution with a pH of 8.32?

Which of the following is the conjugate base of the acid, carbonic acid?

Acids and bases can react with and damage many compounds that are vital to living organisms.

When stress is applied to a system at equilibrium such that the equilibrium is disturbed, the reaction proceeds in the direction that counteracts the disturbance. This explanation best describes ___.

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the molarity of the solution. Assume complete dissociation.

What is the concentration of [H₃O⁺] in an aqueous solution when the [OH^-] is 5.2 x 10^-9M?

Compounds that can act as acids and bases are called ___.

Write the equation illustrating how H₂CO₃reacts as an acid with H₂O.

A sample of blood has a pH of 7.37, which means that the sample of blood is slightly ___.

Calculate the pH of a 0.0019 M HNO₃ solution.

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Exam 7: Acids, Bases, and Equilibrium

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the pH of the solution. Assume complete dissociation.

A is red, B is colorless, and C is yellow. Initially the system is in equilibrium and has an orange color. What color will the system become if it is heated?

A sample of orange juice has a pH of 3.44. Its [H3O+] is ___.

Calculate the pKa of water whose Ka is 1.8 x 10-16.

The symptoms of alkalosis appear when blood serum pH is ___.

Which of the following statements is true?

In the reaction: The conjugate acid of water is ___.

The conjugate base of the hydrogen sulfate ion (HSO4-) is ___.

What is the [H3O+] of an antacid tablet solution with a pH of 8.32?

Which of the following is the conjugate base of the acid, carbonic acid?

Acids and bases can react with and damage many compounds that are vital to living organisms.

When stress is applied to a system at equilibrium such that the equilibrium is disturbed, the reaction proceeds in the direction that counteracts the disturbance. This explanation best describes ___.

A solution of stomach acid contains 1.21 g of HCl in 480.0 mL of solution. Calculate the molarity of the solution. Assume complete dissociation.

What is the concentration of [H3O+] in an aqueous solution when the [OH-] is 5.2 x 10-9 M?

Compounds that can act as acids and bases are called ___.

Write the equation illustrating how H2CO3 reacts as an acid with H2O.

A sample of blood has a pH of 7.37, which means that the sample of blood is slightly ___.

Calculate the pH of a 0.0019 M HNO3 solution.

Science and Measurements

Atoms and Elements

Compounds

An Introduction to Organic Compounds

Reactions

Gases, Solutions, Colloids, and Suspensions

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

A sample of orange juice has a pH of 3.44. Its [H₃O⁺] is ___.

Calculate the pK_a of water whose K_ais 1.8 x 10^-16.

The conjugate base of the hydrogen sulfate ion (HSO₄^-) is ___.

What is the [H₃O⁺] of an antacid tablet solution with a pH of 8.32?

What is the concentration of [H₃O⁺] in an aqueous solution when the [OH^-] is 5.2 x 10^-9M?

Write the equation illustrating how H₂CO₃reacts as an acid with H₂O.

Calculate the pH of a 0.0019 M HNO₃ solution.