Question 1

In an exothermic reaction, heat can be considered a

Accepted Answer

A) catalyst. 
B) product. 
C) rate. 
D) reactant. 
E) determinant. 
A) catalyst. 
B) product. 
C) rate. 
D) reactant. 
E) determinant.

Question 2

In the following gas phase reaction, what is the effect of adding more   to the starting reaction mixture?

Accepted Answer

A)  It would slow the reaction down. 
B)  It would decrease the final quantity of products. 
C)  It would make the reaction more exothermic. 
D)  It would increase the final quantity of products. 
E)  It would make the reaction more endothermic. 
A)  It would slow the reaction down. 
B)  It would decrease the final quantity of products. 
C)  It would make the reaction more exothermic. 
D)  It would increase the final quantity of products. 
E)  It would make the reaction more endothermic.

Question 3

For the reaction at equilibrium, if the temperature is lowered, will the equilibrium shift in the direction of reactar products, or stay the same?

Accepted Answer

A)  reactants 
B)  products 
C)  stay the same 
A)  reactants 
B)  products 
C)  stay the same

Question 4

In any chemical reaction, the rate of the reaction can be increased by

Accepted Answer

A) decreasing the temperature. 
B) increasing the concentrations of the reactants. 
C) adding water to the reaction. 
D) adding product molecules to the reaction mixture. 
E) changing the size of the container. 
A) decreasing the temperature. 
B) increasing the concentrations of the reactants. 
C) adding water to the reaction. 
D) adding product molecules to the reaction mixture. 
E) changing the size of the container.

Question 5

In the reaction of nitrogen gas with oxygen gas to produce nitrogen oxide, what is the effect of adding more oxygen gas to the initial reaction mixture? The reaction is shown below.

Accepted Answer

A)  The equilibrium is not affected. 
B)  The equilibrium shifts to produce more   
C)  The temperature of the reaction mixture is raised. 
D)  The equilibrium shifts to produce more NO. 
E)  Extra catalyst is required to reach equilibrium. 
A)  The equilibrium is not affected. 
B)  The equilibrium shifts to produce more   
C)  The temperature of the reaction mixture is raised. 
D)  The equilibrium shifts to produce more NO. 
E)  Extra catalyst is required to reach equilibrium.

Question 6

For the following reaction, the equilibrium concentrations are:   and   What is the value of the equilibrium constant?

Accepted Answer

A)  45 
B)   0.045 
C)  22 
D)   0.022 
E)   0.10 
A)  45 
B)   0.045 
C)  22 
D)   0.022 
E)   0.10

Question 7

For the following reaction, the equilibrium constant    is  2.0  at a certain temperature. The reaction is endothermi What do you expect to happen to the concentration of  NO if the temperature is doubled?

Accepted Answer

A)  There will be no change in [NO]. 
B)  The change in concentration of [NO] will depend on the size of the vessel. 
C)  The concentration of  [NO]  will decrease. 
D)  A catalyst will be needed to make a change in concentration. 
E)  The concentration of [NO] will increase. 
A)  There will be no change in [NO]. 
B)  The change in concentration of [NO] will depend on the size of the vessel. 
C)  The concentration of  [NO]  will decrease. 
D)  A catalyst will be needed to make a change in concentration. 
E)  The concentration of [NO] will increase.

Question 8

What is the correct form of the equilibrium expression for the reaction of hydrogen and oxygen to form water? The equation is:

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 10

In the reaction of carbon dioxide with water to give carbonic acid, the only gaseous component is the carbon dioxide. What will happen to the equilibrium concentration of carbonic acid if the concentration of carbon
Dioxide is increased in the container?

Accepted Answer

A) The concentration of carbonic acid will increase. 
B) There will be twice as much carbonic acid as carbon dioxide. 
C) The carbonic acid concentration will decrease. 
D) There will be more water available for the reaction. 
E) The carbonic acid concentration will stay the same. 
A) The concentration of carbonic acid will increase. 
B) There will be twice as much carbonic acid as carbon dioxide. 
C) The carbonic acid concentration will decrease. 
D) There will be more water available for the reaction. 
E) The carbonic acid concentration will stay the same.

Question 11

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction.
Write the form of the equilibrium expression.

Accepted Answer

The answer of The equilibrium between hemoglobin and oxyhemoglobin in...

Question 12

The rate of any chemical reaction can be determined by observing

Accepted Answer

A) the amount of product formed in a unit of time. 
B) the number of chemical bonds broken and formed. 
C) the ratio of product concentration to reactant concentration. 
D) the theoretical yield of the reaction. 
E) the percent composition of the final product. 
A) the amount of product formed in a unit of time. 
B) the number of chemical bonds broken and formed. 
C) the ratio of product concentration to reactant concentration. 
D) the theoretical yield of the reaction. 
E) the percent composition of the final product.

Question 13

A catalyst is

Accepted Answer

A) a reactant in a chemical reaction. 
B) a substance that increases the energy of the products. 
C) a product in a chemical reaction. 
D) a substance that speeds up a reaction without being consumed in the reaction. 
E) a substance that decreases the energy of the products. 
A) a reactant in a chemical reaction. 
B) a substance that increases the energy of the products. 
C) a product in a chemical reaction. 
D) a substance that speeds up a reaction without being consumed in the reaction. 
E) a substance that decreases the energy of the products.

Question 14

The reaction of hemoglobin with oxygen can be written as follows.   If the amount of oxygen available to the blood decreases significantly, what happens to the individual involved?

Accepted Answer

A) Anemia results. 
B) Oxygen poisoning results. 
C) Acclimatization results. 
D) Hypoxia results. 
E) Nitrogen narcosis results. 
A) Anemia results. 
B) Oxygen poisoning results. 
C) Acclimatization results. 
D) Hypoxia results. 
E) Nitrogen narcosis results.

Question 15

Refrigerating perishable foods affects biochemical reactions by

Accepted Answer

A) improving the appearance of the foods. 
B) catalyzing the removal of harmful chemicals from the foods. 
C) increasing concentrations of antioxidants. 
D) decreasing the rate of reactions affecting spoilage. 
E) removing bacteria. 
A) improving the appearance of the foods. 
B) catalyzing the removal of harmful chemicals from the foods. 
C) increasing concentrations of antioxidants. 
D) decreasing the rate of reactions affecting spoilage. 
E) removing bacteria.

Question 16

What is the correct form of the equilibrium expression?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 17

For the following equilibrium reaction, which cause and effect are correctly matched?

Accepted Answer

A)  remove   shift left 
B)  remove   shift left 
C)  remove heat, no change 
D)  add   shift left 
E)  add heat, shift right 
A)  remove   shift left 
B)  remove   shift left 
C)  remove heat, no change 
D)  add   shift left 
E)  add heat, shift right

Question 18

For the following reaction, the equilibrium constant    is  2.0  at a certain temperature. Write the equilibrium expression of the equilibrium constant,

Accepted Answer

A)    
B)     
C)     
D)    
E)     
A)    
B)     
C)     
D)    
E)

Question 19

For the following reaction, the equilibrium concentration of   is  0.38 M and equilibrium concentration of   is  1.0 M. What is the value of the equilibrium constant?

Accepted Answer

A)   1.0 
B)   0.14 
C)   2.6 
D)   0.38 
E)   6.9 
A)   1.0 
B)   0.14 
C)   2.6 
D)   0.38 
E)   6.9

Question 20

For the reaction at equilibrium, if   is added, the amount of   present will

Accepted Answer

A)  decrease. 
B)  increase. 
C)  stay the same. 
A)  decrease. 
B)  increase. 
C)  stay the same.

Exam 10: Reaction Rates and Chemical Equilibrium

In an exothermic reaction, heat can be considered a

In the following gas phase reaction, what is the effect of adding more to the starting reaction mixture?

For the reaction at equilibrium, if the temperature is lowered, will the equilibrium shift in the direction of reactar products, or stay the same?

In any chemical reaction, the rate of the reaction can be increased by

In the reaction of nitrogen gas with oxygen gas to produce nitrogen oxide, what is the effect of adding more oxygen gas to the initial reaction mixture? The reaction is shown below.

For the following reaction, the equilibrium concentrations are: and What is the value of the equilibrium constant?

For the following reaction, the equilibrium constant is 2.0 at a certain temperature. The reaction is endothermi What do you expect to happen to the concentration of NO if the temperature is doubled?

What is the correct form of the equilibrium expression for the reaction of hydrogen and oxygen to form water? The equation is:

Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product?

In the reaction of carbon dioxide with water to give carbonic acid, the only gaseous component is the carbon dioxide. What will happen to the equilibrium concentration of carbonic acid if the concentration of carbon Dioxide is increased in the container?

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction. Write the form of the equilibrium expression.

The rate of any chemical reaction can be determined by observing

A catalyst is

The reaction of hemoglobin with oxygen can be written as follows. If the amount of oxygen available to the blood decreases significantly, what happens to the individual involved?

Refrigerating perishable foods affects biochemical reactions by

What is the correct form of the equilibrium expression?

For the following equilibrium reaction, which cause and effect are correctly matched?

For the following reaction, the equilibrium constant is 2.0 at a certain temperature. Write the equilibrium expression of the equilibrium constant,

For the following reaction, the equilibrium concentration of is 0.38 M and equilibrium concentration of is 1.0 M. What is the value of the equilibrium constant?

For the reaction at equilibrium, if is added, the amount of present will

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