Question 1

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

Accepted Answer

A)   21 min
B)   42 min
C)   84 min
D)   120 min
E)   101 minF) A) and D)
G) A) and C)

Question 2

For the reaction A(g)  + 2B(g)  → 2C(g)  + 2D(g) 
The following data were collected at constant temperature. Determine the correct rate law for this reaction. 2[B] C)  Rate = k[A][B]2 D)  Rate = k[A] E)  Rate = k[A]3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Rate = k[A][B]
B)   Rate = k[A]2[B]
C)   Rate = k[A][B]2
D)   Rate = k[A]
E)   Rate = k[A]3F) A) and B)
G) C) and D)

Question 3

The following is an Arrhenius plot of a first-order reaction. The rate constant is measured in units of s-1. -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction?

Accepted Answer

A)   -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   -1.   If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and D)
G) B) and C)

Question 4

For the reaction A + 2B → C, which expression is correct?

Accepted Answer

A)   Δ[C]/Δt = Δ[A]/Δt
B)   Δ[C]/Δt = 2Δ[B]/Δt
C)   Δ[C]/Δt = -2Δ[B]/Δt
D)   Δ[C]/Δt = -½Δ[B]/Δt
E)   Δ[C]/Δt = -½Δ[A]/ΔtF) A) and D)
G) C) and D)

Question 5

Consider the general reaction 5Br-(aq)  + BrO3-(aq)  + 6H+(aq)  → 3Br2(aq)  + 3H2O(aq) 
For this reaction, which is equal to Δ[Br2]/Δt?

Accepted Answer

A)   -Δ[H2O]/Δt
B)   3Δ[BrO3-]/Δt
C)   -5Δ[Br-]/Δt
D)   -0.6Δ[Br-]/Δt
E)   None of these choices is correct.F) B) and D)
G) A) and B)

Question 6

The reaction A + 2B → Products has been found to have the rate law, rate = k[A][B]2. While holding the concentration of A constant, the concentration of B is increased to three times its initial value. By what factor does the rate of reaction increase?

Accepted Answer

A)   3
B)   6
C)   9
D)   27
E)   30F) A) and B)
G) B) and E)

Question 7

Below is a plot of the reaction of A decomposing to form products.  Based on the figure, which might be the order of the reaction with respect to A?

Accepted Answer

A)   The reaction must only be zeroth order in A.
B)   The reaction must only be first order in A.
C)   The reaction must only be second order in A.
D)   The reaction could be either first order in A or second order in A.
E)   The reaction could be of any order in A.F) D) and E)
G) B) and D)

Question 8

The rate law predicted by the following two-step mechanism is Rate = k[A][B].
A → C + B (slow)
A + B → C + E (fast)

Accepted Answer

A) True 
 B)False

Question 9

Which is the correct unit for a first-order rate constant?

Accepted Answer

A)   s-1
B)   M • s-1
C)   M • s
D)   M -1 • s-1
E)   M -2 • s-1F) None of the above
G) B) and C)

Question 10

What is the name given to the slowest step in the mechanism of a reaction?

Accepted Answer

A)   Catalytic step
B)   Mechanistic step
C)   Rate-determining step
D)   Step 1
E)   Rate stepF) B) and C)
G) A) and D)

Question 11

The following initial rate data apply to the reaction F2(g)  + 2Cl2O(g)  → 2FClO2(g)  + Cl2(g) . 2(g)  + 2Cl2O(g)  → 2FClO2(g)  + Cl2(g) .   Which of the following is the rate law for this reaction? A)  rate = k[F2]2[Cl2O]4 B)  rate = k[F2]2[Cl2O] C)  rate = k[F2][Cl2O] D)  rate = k[F2][Cl2O]2 E)  rate = k[F2]2[Cl2O]2" class="answers-bank-image d-inline" rel="preload" > Which of the following is the rate law for this reaction?

Accepted Answer

A)   rate = k[F2]2[Cl2O]4
B)   rate = k[F2]2[Cl2O]
C)   rate = k[F2][Cl2O]
D)   rate = k[F2][Cl2O]2
E)   rate = k[F2]2[Cl2O]2F) All of the above
G) B) and D)

Question 12

The step of the reaction mechanism which is the slowest step is called ________-________.

Accepted Answer

The answer of The step of the reaction mechanism which...

Exam 14: Chemical Kinetics

Consider the general reaction 5Br^-(aq) + BrO₃^-(aq) + 6H⁺(aq) → 3Br₂(aq) + 3H₂O(aq) For this reaction, which is equal to Δ[Br₂]/Δt?

Correct Answer
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For the reaction A(g) + 2B(g) → 2C(g) + 2D(g) The following data were collected at constant temperature. Determine the correct rate law for this reaction.

Correct Answer
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The following is an Arrhenius plot of a first-order reaction. The rate constant is measured in units of s^-1. If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction?

Correct Answer
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The rate law predicted by the following two-step mechanism is Rate = k[A][B]. A → C + B (slow) A + B → C + E (fast)

Correct Answer
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A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

Correct Answer
verified

Below is a plot of the reaction of A decomposing to form products. Based on the figure, which might be the order of the reaction with respect to A?

Correct Answer
verified

The following initial rate data apply to the reaction F₂(g) + 2Cl₂O(g) → 2FClO₂(g) + Cl₂(g) . Which of the following is the rate law for this reaction?

Correct Answer
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For the reaction A + 2B → C, which expression is correct?

Correct Answer
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Which is the correct unit for a first-order rate constant?

Correct Answer
verified

What is the name given to the slowest step in the mechanism of a reaction?

Correct Answer
verified

The step of the reaction mechanism which is the slowest step is called -.

Correct Answer
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The reaction A + 2B → Products has been found to have the rate law, rate = k[A][B]². While holding the concentration of A constant, the concentration of B is increased to three times its initial value. By what factor does the rate of reaction increase?

Correct Answer
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Exam 14: Chemical Kinetics

Consider the general reaction 5Br-(aq) + BrO3-(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq) For this reaction, which is equal to Δ[Br2]/Δt?

Correct AnswerverifiedShow Answer

For the reaction A(g) + 2B(g) → 2C(g) + 2D(g) The following data were collected at constant temperature. Determine the correct rate law for this reaction.

Correct AnswerverifiedShow Answer

The following is an Arrhenius plot of a first-order reaction. The rate constant is measured in units of s-1. If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction?

Correct AnswerverifiedShow Answer

The rate law predicted by the following two-step mechanism is Rate = k[A][B]. A → C + B (slow) A + B → C + E (fast)

Correct AnswerverifiedShow Answer

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

Correct AnswerverifiedShow Answer

Below is a plot of the reaction of A decomposing to form products. Based on the figure, which might be the order of the reaction with respect to A?

Correct AnswerverifiedShow Answer

The following initial rate data apply to the reaction F2(g) + 2Cl2O(g) → 2FClO2(g) + Cl2(g) . Which of the following is the rate law for this reaction?

Correct AnswerverifiedShow Answer

For the reaction A + 2B → C, which expression is correct?

Correct AnswerverifiedShow Answer

Which is the correct unit for a first-order rate constant?

Correct AnswerverifiedShow Answer

What is the name given to the slowest step in the mechanism of a reaction?

Correct AnswerverifiedShow Answer

The step of the reaction mechanism which is the slowest step is called ________-________.

Correct AnswerverifiedShow Answer

The reaction A + 2B → Products has been found to have the rate law, rate = k[A][B]2. While holding the concentration of A constant, the concentration of B is increased to three times its initial value. By what factor does the rate of reaction increase?

Correct AnswerverifiedShow Answer

Consider the general reaction 5Br^-(aq) + BrO₃^-(aq) + 6H⁺(aq) → 3Br₂(aq) + 3H₂O(aq) For this reaction, which is equal to Δ[Br₂]/Δt?

Correct Answer
verified

Correct Answer
verified

The following is an Arrhenius plot of a first-order reaction. The rate constant is measured in units of s^-1. If a catalyst is added to the reaction, which could correspond to an Arrhenius plot of the catalyzed reaction?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The following initial rate data apply to the reaction F₂(g) + 2Cl₂O(g) → 2FClO₂(g) + Cl₂(g) . Which of the following is the rate law for this reaction?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The step of the reaction mechanism which is the slowest step is called -.

Correct Answer
verified

The reaction A + 2B → Products has been found to have the rate law, rate = k[A][B]². While holding the concentration of A constant, the concentration of B is increased to three times its initial value. By what factor does the rate of reaction increase?

Correct Answer
verified