Question 1

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.

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]3 
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]3

Question 2

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

Question 3

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

Question 4

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?

Accepted Answer

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

Question 5

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]/Δt 
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]/Δt

Question 6

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-1 
A)  s-1 
B)  M • s-1 
C)  M • s 
D)  M -1 • s-1 
E)  M -2 • s-1

Question 7

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 8

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...

Question 9

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

Question 10

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. 
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.

Question 11

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)  30 
A)  3 
B)  6 
C)  9 
D)  27 
E)  30

Question 12

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?

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]2 
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

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.

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

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

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?

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

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

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

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

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

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?

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?

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?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

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Exam 14: Chemical Kinetics

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.

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

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

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?

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

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

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

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

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

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?

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?

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?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

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

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?

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

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?

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?