Question 1

Which of the following K values indicates a reaction that most favors the reactants?

Accepted Answer

A)   1 × 10-2
B)   1 × 102
C)   1 × 10-11
D)   1 × 1011

Question 2

Which K value indicates a reaction that MOST favors the products?

Accepted Answer

A)   1 × 10-2
B)   1 × 102
C)   1 × 10-11
D)   1 × 1011

Question 3

In the diagram, the number 4 corresponds to the:

Accepted Answer

A)   reactants.
B)   products.
C)   activation energy.
D)   transition state.
E)   net energy change. B

Question 4

Which choice is NOT included in the equilibrium expression?

Accepted Answer

A)   solids
B)   gases
C)   aqueous solutions

Question 5

In the diagram, the net energy change is about:

Accepted Answer

A)   60 kJ.
B)   130 kJ.
C)   80 kJ.
D)   20 kJ.

Question 6

In the diagram, the activation energy of the FORWARD reaction is about:

Accepted Answer

A)   60 kJ.
B)   130 kJ.
C)   80 kJ.
D)   20 kJ.

Question 7

The equilibrium expression of the following reaction is represented by: 
H2 (g)  + I2 (g)  2 HI (g)

Accepted Answer

A)   2 (g)  + I2 (g)  2 HI (g)  
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C)   2 (g)  + I2 (g)  2 HI (g)  
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D)   2 (g)  + I2 (g)  2 HI (g)  
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Question 8

In a saturated solution of aluminum phosphate, AlPO4, both [Al3+] and [PO43-] = 7.9 × 10-10 M. Calculate the value of the solubility product for this compound.

Accepted Answer

A)   6.2 × 10-19
B)   2.8 × 10-5
C)   1.6 × 10-9
D)   4.0 × 10-10

Question 9

In the diagram, the FORWARD reaction is:

Accepted Answer

A)   endothermic.
B)   exothermic.
C)   exergetic.
D)   ergonomic.

Question 10

In the diagram, the number 1 corresponds to the:

Accepted Answer

A)   reactants.
B)   products.
C)   activation energy.
D)   transition state.
E)   net energy change.

Question 11

Write the solubility product expression for the following solubility equilibrium: CuOH (s)   Cu+ (aq)  + OH- (aq)

Accepted Answer

A)    Cu+ (aq)  + OH- (aq)  
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B)    Cu+ (aq)  + OH- (aq)  
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C)    Cu+ (aq)  + OH- (aq)  
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D)    Cu+ (aq)  + OH- (aq)  
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Question 12

The equilibrium expression of the following reaction is represented by: 
2 CO (g)  + O2 (g)   2 CO2 (g)

Accepted Answer

A)   2 (g)   2 CO2 (g)  
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B)   2 (g)   2 CO2 (g)  
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C)   2 (g)   2 CO2 (g)  
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D)   2 (g)   2 CO2 (g)  
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Question 13

In the diagram, the number 5 corresponds to the:

Accepted Answer

A)   reactants.
B)   products.
C)   activation energy.
D)   transition state.
E)   net energy change.

Question 14

In the diagram, the energy of the transition state is about:

Accepted Answer

A)   50 kJ/mol.
B)   130 kJ/mol.
C)   80 kJ/mol.
D)   20 kJ/mol.

Question 15

Given the following equation and equilibrium concentrations, determine the value of the equilibrium constant. 
PCl5 (g)  PCl3 (g)  + Cl2 (g) 
[PCl5] = 5.30 M; [PCl3] = 0.406 M; [Cl2] = 0.406 M

Accepted Answer

A)   32.2
B)   0.0311
C)   6.52
D)   0.153

Question 16

Consider the equilibrium reaction between the gas phases of hydrogen and iodine: H2 (g)  + I2 (g)   2 HI (g) 
If the partial pressures of hydrogen and of iodine are 0.42 atm each, what is the partial pressure of HI if K = 7.1 × 102?

Accepted Answer

A)   11 atm
B)   63 atm
C)   125 atm
D)   2.5 × 10-4 atm

Question 17

In the diagram, the forward reaction will probably not proceed without an input of energy because the:

Accepted Answer

A)   activation energy is too high.
B)   net energy change is too low.
C)   products are too far apart from the reactants.
D)   reactant energy is too high to start with.

Question 18

In the diagram, the reaction described is _____ and the equilibrium favors the _____.

Accepted Answer

A)   endothermic; reactants
B)   endothermic; products
C)   exothermic; reactants
D)   exothermic; products

Question 19

The symbol used to represent the equilibrium solubility of a slightly soluble compound in water is:

Accepted Answer

A)   Ka.
B)   Kb.
C)   Ks.
D)   Ksp.

Question 20

Considering the solubility product values for the following carbonates, which is the LEAST soluble?

Accepted Answer

A)   CuCO3Ksp = 1.4 × 10-10
B)   FeCO3 Ksp = 3.2 × 10-11
C)   PbCO3Ksp = 7.4 × 10-14
D)   MgCO3Ksp = 3.5 × 10-8 C

Exam 13: Reaction Rates Equilibrium

Which of the following K values indicates a reaction that most favors the reactants?

Correct AnswerverifiedShow Answer

Which K value indicates a reaction that MOST favors the products?

Correct AnswerverifiedShow Answer

In the diagram, the number 4 corresponds to the:

Correct AnswerverifiedB

Which choice is NOT included in the equilibrium expression?

Correct AnswerverifiedShow Answer

In the diagram, the net energy change is about:

Correct AnswerverifiedShow Answer

In the diagram, the activation energy of the FORWARD reaction is about:

Correct AnswerverifiedShow Answer

The equilibrium expression of the following reaction is represented by: H2 (g) + I2 (g) 2 HI (g)

Correct AnswerverifiedA

In a saturated solution of aluminum phosphate, AlPO4, both [Al3+] and [PO43-] = 7.9 × 10-10 M. Calculate the value of the solubility product for this compound.

Correct AnswerverifiedShow Answer

In the diagram, the FORWARD reaction is:

Correct AnswerverifiedShow Answer

In the diagram, the number 1 corresponds to the:

Correct AnswerverifiedShow Answer

Write the solubility product expression for the following solubility equilibrium: CuOH (s)  Cu+ (aq) + OH- (aq)

Correct AnswerverifiedShow Answer

The equilibrium expression of the following reaction is represented by: 2 CO (g) + O2 (g)  2 CO2 (g)

Correct AnswerverifiedShow Answer

In the diagram, the number 5 corresponds to the:

Correct AnswerverifiedShow Answer

In the diagram, the energy of the transition state is about:

Correct AnswerverifiedShow Answer

Given the following equation and equilibrium concentrations, determine the value of the equilibrium constant. PCl5 (g) PCl3 (g) + Cl2 (g) [PCl5] = 5.30 M; [PCl3] = 0.406 M; [Cl2] = 0.406 M

Correct AnswerverifiedShow Answer

Consider the equilibrium reaction between the gas phases of hydrogen and iodine: H2 (g) + I2 (g)  2 HI (g) If the partial pressures of hydrogen and of iodine are 0.42 atm each, what is the partial pressure of HI if K = 7.1 × 102?

Correct AnswerverifiedShow Answer

In the diagram, the forward reaction will probably not proceed without an input of energy because the:

Correct AnswerverifiedShow Answer

In the diagram, the reaction described is _____ and the equilibrium favors the _____.

Correct AnswerverifiedShow Answer

The symbol used to represent the equilibrium solubility of a slightly soluble compound in water is:

Correct AnswerverifiedShow Answer

Considering the solubility product values for the following carbonates, which is the LEAST soluble?

Correct AnswerverifiedC

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B

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The equilibrium expression of the following reaction is represented by: H₂ (g) + I₂ (g) 2 HI (g)

Correct Answer
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A

In a saturated solution of aluminum phosphate, AlPO₄, both [Al³⁺] and [PO₄³^-] = 7.9 × 10^-¹⁰ M. Calculate the value of the solubility product for this compound.

Correct Answer
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Write the solubility product expression for the following solubility equilibrium: CuOH (s)  Cu⁺ (aq) + OH^- (aq)

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The equilibrium expression of the following reaction is represented by: 2 CO (g) + O₂ (g)  2 CO₂ (g)

Correct Answer
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Given the following equation and equilibrium concentrations, determine the value of the equilibrium constant. PCl₅ (g) PCl₃ (g) + Cl₂ (g) [PCl₅] = 5.30 M; [PCl₃] = 0.406 M; [Cl₂] = 0.406 M

Correct Answer
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Consider the equilibrium reaction between the gas phases of hydrogen and iodine: H₂ (g) + I₂ (g)  2 HI (g) If the partial pressures of hydrogen and of iodine are 0.42 atm each, what is the partial pressure of HI if K = 7.1 × 10²?

Correct Answer
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In the diagram, the reaction described is _ and the equilibrium favors the _.

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C