Question 1

What is the molar solubility,(S),of FeCO3 if the   for this substance?

Accepted Answer

A) 9.42 ×   M 
B) 5.54×   M 
C) 3.07 ×   M 
D) 1.54 ×   M 
E) none of the above 
A) 9.42 ×   M 
B) 5.54×   M 
C) 3.07 ×   M 
D) 1.54 ×   M 
E) none of the above

Question 2

Adding heat to an exothermic reaction will cause the reaction to remain unchanged.

Accepted Answer

A) True 
 B)False

Question 3

If the equilibrium constant,   ,for a reaction increases upon heating,the reaction must have been endothermic.

Accepted Answer

A) True 
 B)False

Question 4

For the reaction   ,   and the equilibrium concentration of silver ion is   M.What is

Accepted Answer

A) 0.0038 
B) 9.6   
C) 2.6 ×   
D) 1.0   
E) none of the above 
A) 0.0038 
B) 9.6   
C) 2.6 ×   
D) 1.0   
E) none of the above

Question 5

Increasing the amount of carbon in the reaction below will cause the reaction to proceed to the left so that equilibrium will be restored.

Accepted Answer

A) True 
 B)False

Question 6

A reversible reaction is one that can be stopped and then restarted as needed.

Accepted Answer

A) True 
 B)False

Question 7

Which statement below is FALSE?

Accepted Answer

A) The rate of a reaction can be increased by increasing concentrations of reactants. 
B) The rate of a reaction can be increased by altering the temperature. 
C) The rate of a reaction can be increased by adding a catalyst. 
D) A catalyst alters the equilibrium constant. 
E) All of the above are true. 
A) The rate of a reaction can be increased by increasing concentrations of reactants. 
B) The rate of a reaction can be increased by altering the temperature. 
C) The rate of a reaction can be increased by adding a catalyst. 
D) A catalyst alters the equilibrium constant. 
E) All of the above are true.

Question 8

What happens to the equilibrium position of an endothermic reaction when you add heat?

Accepted Answer

A) shifts to the left 
B) shifts to the right 
C) does nothing 
D) doubles 
E) halves 
A) shifts to the left 
B) shifts to the right 
C) does nothing 
D) doubles 
E) halves

Question 9

What is the concentration of the   ion in solution when [   ] = 0.25 M given that the   for the following reaction:

Accepted Answer

A) 5.2 ×   
B) 3.7 ×   
C) 2.7 ×   
D) 19.2 
E) none of the above 
A) 5.2 ×   
B) 3.7 ×   
C) 2.7 ×   
D) 19.2 
E) none of the above

Question 10

For a given chemical equation,the coefficients for each substance become the exponents for each substance in the written equilibrium expression.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following changes will increase the reaction rate?

Accepted Answer

A) an increase in the concentration of the products 
B) a decrease of the reaction temperature 
C) allowing more time for the reaction 
D) an increase in the concentration of reactants 
E) all of the above 
A) an increase in the concentration of the products 
B) a decrease of the reaction temperature 
C) allowing more time for the reaction 
D) an increase in the concentration of reactants 
E) all of the above

Question 12

For the reaction   ,the equilibrium concentrations are as follows:   M,   M.The equilibrium constant is:

Accepted Answer

A) 1.0 ×   . 
B) 1.0 ×   . 
C) 1.0 ×   . 
D) 1.0 ×   . 
E) none of the above 
A) 1.0 ×   . 
B) 1.0 ×   . 
C) 1.0 ×   . 
D) 1.0 ×   . 
E) none of the above

Question 13

A catalyst speeds up a chemical reaction as it is being consumed.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is TRUE about a chemical system in equilibrium?

Accepted Answer

A) No reaction takes place. 
B) Temperature changes have no effect on reaction rate. 
C) Addition of more reactants have no effect on reaction rate. 
D) Reaction rate remains stable as long as temperature and pressure are stable. 
E) none of the above 
A) No reaction takes place. 
B) Temperature changes have no effect on reaction rate. 
C) Addition of more reactants have no effect on reaction rate. 
D) Reaction rate remains stable as long as temperature and pressure are stable. 
E) none of the above

Question 15

Which equilibrium constant represents a reaction that favors the reactants to the greatest extent?

Accepted Answer

A)    = 100 
B)    = 1.0 ×   
C)    = 1.0 ×   
D)    = 1.0 ×   
E) not enough information 
A)    = 100 
B)    = 1.0 ×   
C)    = 1.0 ×   
D)    = 1.0 ×   
E) not enough information

Question 16

For the reaction   ,   ,and the equilibrium concentration of sulfide ion is   .What is

Accepted Answer

A) 0.052 M 
B) 0.32 M 
C) 0.015 M 
D) 0.10 M 
E) none of the above 
A) 0.052 M 
B) 0.32 M 
C) 0.015 M 
D) 0.10 M 
E) none of the above

Question 17

For the reaction 2 A ⇌ B,the equilibrium concentrations are as follows: [A] = 0.056 M and [B] = 0.12 M.Calculate the equilibrium constant (Keq)for the reaction.

Accepted Answer

A) 2.6 × 10-2 
B) 0.26 
C) 2.1 
D) 38 
E) none of the above 
A) 2.6 × 10-2 
B) 0.26 
C) 2.1 
D) 38 
E) none of the above

Question 18

What must be TRUE for a reaction possessing a large equilibrium constant?

Accepted Answer

A) The reaction rate is fast. 
B) The reaction rate is slow. 
C) The forward reaction is favored. 
D) The reverse reaction is favored. 
E) none of the above 
A) The reaction rate is fast. 
B) The reaction rate is slow. 
C) The forward reaction is favored. 
D) The reverse reaction is favored. 
E) none of the above

Question 19

Which of the following is FALSE about enzymes?

Accepted Answer

A) They act as biological catalysts. 
B) They lower the activation energy of biological reactions. 
C) They increase the temperature of biological reactions to speed them up. 
D) They are highly specific in their catalytic activity. 
E) none of the above 
A) They act as biological catalysts. 
B) They lower the activation energy of biological reactions. 
C) They increase the temperature of biological reactions to speed them up. 
D) They are highly specific in their catalytic activity. 
E) none of the above

Question 20

Dynamic equilibrium is established when the rate of the forward reaction goes to zero.

Accepted Answer

A) True 
 B)False

What is the molar solubility,(S),of FeCO₃ if the for this substance?

Adding heat to an exothermic reaction will cause the reaction to remain unchanged.

If the equilibrium constant, ,for a reaction increases upon heating,the reaction must have been endothermic.

For the reaction , and the equilibrium concentration of silver ion is M.What is

Increasing the amount of carbon in the reaction below will cause the reaction to proceed to the left so that equilibrium will be restored.

A reversible reaction is one that can be stopped and then restarted as needed.

Which statement below is FALSE?

What happens to the equilibrium position of an endothermic reaction when you add heat?

What is the concentration of the ion in solution when [ ] = 0.25 M given that the for the following reaction:

For a given chemical equation,the coefficients for each substance become the exponents for each substance in the written equilibrium expression.

Which of the following changes will increase the reaction rate?

For the reaction ,the equilibrium concentrations are as follows: M, M.The equilibrium constant is:

A catalyst speeds up a chemical reaction as it is being consumed.

Which of the following is TRUE about a chemical system in equilibrium?

Which equilibrium constant represents a reaction that favors the reactants to the greatest extent?

For the reaction , ,and the equilibrium concentration of sulfide ion is .What is

For the reaction 2 A ⇌ B,the equilibrium concentrations are as follows: [A] = 0.056 M and [B] = 0.12 M.Calculate the equilibrium constant (K_eq)for the reaction.

What must be TRUE for a reaction possessing a large equilibrium constant?

Which of the following is FALSE about enzymes?

Dynamic equilibrium is established when the rate of the forward reaction goes to zero.

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Exam 15: Chemical Equilibrium

What is the molar solubility,(S),of FeCO3 if the for this substance?

Adding heat to an exothermic reaction will cause the reaction to remain unchanged.

If the equilibrium constant, ,for a reaction increases upon heating,the reaction must have been endothermic.

For the reaction , and the equilibrium concentration of silver ion is M.What is

Increasing the amount of carbon in the reaction below will cause the reaction to proceed to the left so that equilibrium will be restored.

A reversible reaction is one that can be stopped and then restarted as needed.

Which statement below is FALSE?

What happens to the equilibrium position of an endothermic reaction when you add heat?

What is the concentration of the ion in solution when [ ] = 0.25 M given that the for the following reaction:

For a given chemical equation,the coefficients for each substance become the exponents for each substance in the written equilibrium expression.

Which of the following changes will increase the reaction rate?

For the reaction ,the equilibrium concentrations are as follows: M, M.The equilibrium constant is:

A catalyst speeds up a chemical reaction as it is being consumed.

Which of the following is TRUE about a chemical system in equilibrium?

Which equilibrium constant represents a reaction that favors the reactants to the greatest extent?

For the reaction , ,and the equilibrium concentration of sulfide ion is .What is

For the reaction 2 A ⇌ B,the equilibrium concentrations are as follows: [A] = 0.056 M and [B] = 0.12 M.Calculate the equilibrium constant (Keq)for the reaction.

What must be TRUE for a reaction possessing a large equilibrium constant?

Which of the following is FALSE about enzymes?

Dynamic equilibrium is established when the rate of the forward reaction goes to zero.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

What is the molar solubility,(S),of FeCO₃ if the for this substance?

For the reaction 2 A ⇌ B,the equilibrium concentrations are as follows: [A] = 0.056 M and [B] = 0.12 M.Calculate the equilibrium constant (K_eq)for the reaction.