Question 1

Write the equilibrium constant expression for the reaction of nitrogen and hydrogen to give ammonia, NH₃ .

Accepted Answer

The answer of Write the equilibrium constant expression for the...

Question 2

Iron metal reacts with oxygen gas to produce iron(III) oxide. What will be the effect of increasing the pressure of oxygen gas in a closed reaction vessel?

Accepted Answer

A) Less reaction will take place. 
B) More iron oxide will be produced. 
C) The reaction mixture will catch fire. 
D) There is no effect; a catalyst is needed. 
E) The rate of production of iron oxide will slow down. 
A) Less reaction will take place. 
B) More iron oxide will be produced. 
C) The reaction mixture will catch fire. 
D) There is no effect; a catalyst is needed. 
E) The rate of production of iron oxide will slow down. B

Question 3

An equilibrium constant Kc = 1 × 10-3 for a reaction indicates that the reaction favors product formation.

Accepted Answer

A) True 
 B)False  False

Question 4

2SO2(g) + O2(g) ⇌ 2SO₃(g) For the reaction at equilibrium, if O2 is added, the amount of SO2 present will

Accepted Answer

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

Question 5

PCl5 (g) ⇌ PCl₃ (g)+ Cl₂ (g) For the reaction at equilibrium, if the volume of the container is increased, the amount of PCl5 present will

Accepted Answer

A) decrease. 
B) increase. 
C) double. 
D) stay the same. 
E) triple. 
A) decrease. 
B) increase. 
C) double. 
D) stay the same. 
E) triple.

Question 6

Treatment of carbon monoxide poisoning can be accomplished by the use of pure oxygen for breathing. This is an example of the use of ________ in a clinical setting.

Accepted Answer

A) the ideal gas law 
B) Le Châtelier's principle 
C) Henry's law 
D) conservation of mass 
E) a precipitation reaction 
A) the ideal gas law 
B) Le Châtelier's principle 
C) Henry's law 
D) conservation of mass 
E) a precipitation reaction

Question 7

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction. Write the form of the equilibrium constant expression. 
Hb + O2 ⇌ HbO2

Accepted Answer

Question 8

For the following reaction, the equilibrium concentration of NO2 is 0.38 M and equilibrium concentration of N2O₄ is 1.0M. What is the value of the equilibrium constant? 2NO2(g) ⇌ N2O₄(g)

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

The equilibrium constant for the production of carbon dioxide from carbon monoxide and oxygen is Kc = 2 × 1011. This means that the reaction mixture at equilibrium is likely to consist of

Accepted Answer

A) mostly starting materials. 
B) an equal mixture of products and reactants. 
C) twice as much starting material as product. 
D) twice as much product as starting material. 
E) mostly products. 
A) mostly starting materials. 
B) an equal mixture of products and reactants. 
C) twice as much starting material as product. 
D) twice as much product as starting material. 
E) mostly products.

Question 11

One metal that is used as a catalyst in a catalytic converter in an automobile is

Accepted Answer

A) carbon. 
B) iron. 
C) copper. 
D) platinum. 
E) plutonium. 
A) carbon. 
B) iron. 
C) copper. 
D) platinum. 
E) plutonium.

Question 12

A mixture at equilibrium that contains less product than reactant has a Kc that is ________ than 1.

Accepted Answer

The answer of A mixture at equilibrium that contains less...

Question 13

What is the correct form for the equilibrium constant expression for this reaction? H2(g) + F2(g) ⇌ 2HF(g)

Accepted Answer

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

Question 14

For the following equilibrium reaction, which cause and effect are correctly matched? CO(g) + 2H2(g) ⇌ CH₃ OH(g) + heat

Accepted Answer

A) add heat, shift right 
B) add CO, shift left 
C) remove CH₃
OH, shift left 
D) remove heat, no change 
E) remove H2, shift left 
A) add heat, shift right 
B) add CO, shift left 
C) remove CH₃
OH, shift left 
D) remove heat, no change 
E) remove H2, shift left

Question 15

N2(g) + O2(g) ⇌ 2NO(g) For the reaction at equilibrium, if the volume of the container is decreased, the amount of NO present will

Accepted Answer

A) decrease. 
B) increase. 
C) double. 
D) stay the same. 
E) triple. 
A) decrease. 
B) increase. 
C) double. 
D) stay the same. 
E) triple.

Question 16

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Write the equilibrium constant expression of the equilibrium constant, Kc. 2NOBr(g) ⇌ 2NO(g) + Br2(g)

Accepted Answer

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

Question 17

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Bromine can be liquefied easily and removed from the reaction vessel as it is formed. If this is done, how will it affect the equilibrium reaction? 2NOBr(g) ⇌ 2NO(g) + Br2(g)

Accepted Answer

A) More products will be made as Br2 is removed. 
B) There will be a larger proportion NOBr in the vessel when equilibrium is reached. 
C) Less NO will be made. 
D) The pressure in the vessel will increase. 
E) The equilibrium constant will change. 
A) More products will be made as Br2 is removed. 
B) There will be a larger proportion NOBr in the vessel when equilibrium is reached. 
C) Less NO will be made. 
D) The pressure in the vessel will increase. 
E) The equilibrium constant will change.

Question 18

The equilibrium constant for the reaction of H2 and F2 to form HF, the concentration of HF is raised to the second power.

Accepted Answer

A) True 
 B)False

Question 19

3H2(g) + N2(g) ⇌ 2NH₃(g) + heat For the reaction at equilibrium, if the temperature is raised, the amount of N2 will

Accepted Answer

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

Question 20

When you open a bottle of a soft drink and leave it open, the drink eventually goes flat. This happens because the equilibrium between carbonic acid and carbon dioxide shifts to produce

Accepted Answer

A) more carbonic acid. 
B) more water. 
C) more oxygen. 
D) more carbon dioxide. 
E) more hydrogen ions. 
A) more carbonic acid. 
B) more water. 
C) more oxygen. 
D) more carbon dioxide. 
E) more hydrogen ions.

Exam 10: Reaction Rates and Chemical Equilibrium

Write the equilibrium constant expression for the reaction of nitrogen and hydrogen to give ammonia, NH₃ .

Iron metal reacts with oxygen gas to produce iron(III) oxide. What will be the effect of increasing the pressure of oxygen gas in a closed reaction vessel?

An equilibrium constant Kc = 1 × 10-3 for a reaction indicates that the reaction favors product formation.

2SO2(g) + O2(g) ⇌ 2SO₃(g) For the reaction at equilibrium, if O2 is added, the amount of SO2 present will

PCl5 (g) ⇌ PCl₃ (g)+ Cl₂ (g) For the reaction at equilibrium, if the volume of the container is increased, the amount of PCl5 present will

Treatment of carbon monoxide poisoning can be accomplished by the use of pure oxygen for breathing. This is an example of the use of ________ in a clinical setting.

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction. Write the form of the equilibrium constant expression. Hb + O2 ⇌ HbO2

For the following reaction, the equilibrium concentration of NO2 is 0.38 M and equilibrium concentration of N2O₄ is 1.0M. What is the value of the equilibrium constant? 2NO2(g) ⇌ N2O₄(g)

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

The equilibrium constant for the production of carbon dioxide from carbon monoxide and oxygen is Kc = 2 × 1011. This means that the reaction mixture at equilibrium is likely to consist of

One metal that is used as a catalyst in a catalytic converter in an automobile is

A mixture at equilibrium that contains less product than reactant has a Kc that is ________ than 1.

What is the correct form for the equilibrium constant expression for this reaction? H2(g) + F2(g) ⇌ 2HF(g)

For the following equilibrium reaction, which cause and effect are correctly matched? CO(g) + 2H2(g) ⇌ CH₃ OH(g) + heat

N2(g) + O2(g) ⇌ 2NO(g) For the reaction at equilibrium, if the volume of the container is decreased, the amount of NO present will

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Write the equilibrium constant expression of the equilibrium constant, Kc. 2NOBr(g) ⇌ 2NO(g) + Br2(g)

For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Bromine can be liquefied easily and removed from the reaction vessel as it is formed. If this is done, how will it affect the equilibrium reaction? 2NOBr(g) ⇌ 2NO(g) + Br2(g)

The equilibrium constant for the reaction of H2 and F2 to form HF, the concentration of HF is raised to the second power.

3H2(g) + N2(g) ⇌ 2NH₃(g) + heat For the reaction at equilibrium, if the temperature is raised, the amount of N2 will

When you open a bottle of a soft drink and leave it open, the drink eventually goes flat. This happens because the equilibrium between carbonic acid and carbon dioxide shifts to produce

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An equilibrium constant K_c = 1 × 10^-3 for a reaction indicates that the reaction favors product formation.

The equilibrium between hemoglobin and oxyhemoglobin in the blood can be represented by the following reaction. Write the form of the equilibrium constant expression. Hb + O₂ ⇌ HbO₂

The equilibrium constant for the reaction of H₂ and F₂ to form HF, the concentration of HF is raised to the second power.