Question 1

What is the [H3O+] of a solution whose pOH is 11.00?

Accepted Answer

Question 2

Kw, the equilibrium constant for the ionization of water by the equation below, is 1.0 x 10-14. What does that mean when we are considering pure water?

Accepted Answer

A)  More ions exist than water molecules. 
B)  The majority of the molecules present are in the form of H2O. 
C)  The amount of water is the same as the amount of the ions present. 
D)  There will always be more hydronium ions present than water at equilibrium. 
A)  More ions exist than water molecules. 
B)  The majority of the molecules present are in the form of H2O. 
C)  The amount of water is the same as the amount of the ions present. 
D)  There will always be more hydronium ions present than water at equilibrium.

Question 3

A Ka can be calculated for some chemical reactions. The Ka is

Accepted Answer

A)  the Keq for the reaction to the right. 
B)  the Keq for the reaction to the left. 
C)  the Keq for the dissociation of an acid. 
D)  the pH of a very weak solution. 
A)  the Keq for the reaction to the right. 
B)  the Keq for the reaction to the left. 
C)  the Keq for the dissociation of an acid. 
D)  the pH of a very weak solution.

Question 4

The higher the numerical value of an equilibrium constant (Keq), the further to the right the reaction will proceed.

Accepted Answer

A) True 
 B)False

Question 5

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 B is removed?

Accepted Answer

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

Question 6

What volume of 0.200 M HCl is required to completely neutralize 50.00 mL of 0.150 M KOH?

Accepted Answer

A)  7.50 mL 
B)  50.0 mL 
C)  66.7 mL 
D)  37.5 mL 
A)  7.50 mL 
B)  50.0 mL 
C)  66.7 mL 
D)  37.5 mL

Question 7

When a reaction is at equilibrium,

Accepted Answer

A)  it has no products. 
B)  the rate of the forward reaction is equal to the rate of its reverse. 
C)  it occurs very quickly using up all of the reactants. 
D)  it produces the same amount of product as reactant. 
A)  it has no products. 
B)  the rate of the forward reaction is equal to the rate of its reverse. 
C)  it occurs very quickly using up all of the reactants. 
D)  it produces the same amount of product as reactant.

Question 8

Antacids may contain which ion to reduce acidity?

Accepted Answer

A)  Na+ 
B)  CO32- 
C)  Al3+ 
D)  Cl- 
A)  Na+ 
B)  CO32- 
C)  Al3+ 
D)  Cl-

Question 9

The equilibrium constant, Keq,  for the ammonia synthesis below is found to be 6.0 x 10-2 at 500$\degree$C. Which of the following statements is true at equilibrium?

Accepted Answer

A)  Product concentration is greater than reactant concentration. 
B)  Reactant concentration is greater than product concentration. 
C)  Reactant concentration is the same as product concentration. 
D)  Relative concentrations of reactants and products cannot be predicted. 
A)  Product concentration is greater than reactant concentration. 
B)  Reactant concentration is greater than product concentration. 
C)  Reactant concentration is the same as product concentration. 
D)  Relative concentrations of reactants and products cannot be predicted.

Question 10

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 your own words, explain what happens when a solution containing acid is added to the system and how the buffer prevents the pH from changing.

Accepted Answer

When acid is added t

Question 11

Which of the following is the correct statement concerning the equation below?

Accepted Answer

A)  HSO4- is the conjugate base of SO4- 
B)  HSO4- is the conjugate base of H3O+ 
C)  H2O is the conjugate base of HSO4- 
D)  SO42- is the conjugate base of HSO4- 
A)  HSO4- is the conjugate base of SO4- 
B)  HSO4- is the conjugate base of H3O+ 
C)  H2O is the conjugate base of HSO4- 
D)  SO42- is the conjugate base of HSO4-

What is the [H₃O⁺] of a solution whose pOH is 11.00?

K_w, the equilibrium constant for the ionization of water by the equation below, is 1.0 x 10^-14. What does that mean when we are considering pure water?

A K_a can be calculated for some chemical reactions. The K_a is

The higher the numerical value of an equilibrium constant (K_eq), the further to the right the reaction will proceed.

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 B is removed?

What volume of 0.200 M HCl is required to completely neutralize 50.00 mL of 0.150 M KOH?

When a reaction is at equilibrium,

Antacids may contain which ion to reduce acidity?

Which of the following is the correct statement concerning the equation below?

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Exam 7: Acids, Bases, and Equilibrium

What is the [H3O+] of a solution whose pOH is 11.00?

Kw, the equilibrium constant for the ionization of water by the equation below, is 1.0 x 10-14. What does that mean when we are considering pure water?

A Ka can be calculated for some chemical reactions. The Ka is

The higher the numerical value of an equilibrium constant (Keq), the further to the right the reaction will proceed.

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 B is removed?

What volume of 0.200 M HCl is required to completely neutralize 50.00 mL of 0.150 M KOH?

When a reaction is at equilibrium,

Antacids may contain which ion to reduce acidity?

The equilibrium constant, Keq, for the ammonia synthesis below is found to be 6.0 x 10-2 at 500 °\degree° C. Which of the following statements is true at equilibrium?

Which of the following is the correct statement concerning the equation below?

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

What is the [H₃O⁺] of a solution whose pOH is 11.00?

K_w, the equilibrium constant for the ionization of water by the equation below, is 1.0 x 10^-14. What does that mean when we are considering pure water?

A K_a can be calculated for some chemical reactions. The K_a is

The higher the numerical value of an equilibrium constant (K_eq), the further to the right the reaction will proceed.