Cerium(IV)ion reacts with thallium(I)ion in a one-step reaction shown below. 2 Ce4+(aq)+ Tl+(aq)→ 2 Ce3+(aq)+ Tl3+(aq) If the rate law is: Rate = k[Ce4+]4[Tl+]2,what is the overall order of the reaction?

A) first B) second C) sixth D) eighth A) first B) second C) sixth D) eighth

The following set of data was obtained by the method of initial rates for the reaction: S2O82-(aq)+ 3 I-(aq)→ 2 SO42-(aq)+ I3-(aq) What is the initial rate when S2O82- is 0.15 M and I- is 0.15 M?

A) 4.10 × 10-6 M s-1 B) 8.10 × 10-3 M s-1 C) 1.22 × 10-2 M s-1 D) 5.40 × 10-2 M s-1 A) 4.10 × 10-6 M s-1 B) 8.10 × 10-3 M s-1 C) 1.22 × 10-2 M s-1 D) 5.40 × 10-2 M s-1

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O3(g)+ HO(g)→ HO2(g)+ O2(g) Step 2: HO2(g)+ O(g)→ HO(g)+ O2(g) What is the molecularity of the overall reaction?

A) unimolecular B) bimolecular C) none of these because molecularity is the difference of the exponents in the rate law D) none of these because molecularity only refers to elementary steps A) unimolecular B) bimolecular C) none of these because molecularity is the difference of the exponents in the rate law D) none of these because molecularity only refers to elementary steps

The following set of data was obtained by the method of initial rates for the reaction: (H3C)3CBr + OH- → (H3C)3COH + Br- What is the value of the rate constant,k?

A) 8.8 × 10-4 s-1 B) 4.4 × 10-4 s-1 C) 1.8 × 10-4 s-1 D) none of these A) 8.8 × 10-4 s-1 B) 4.4 × 10-4 s-1 C) 1.8 × 10-4 s-1 D) none of these

Hydroquinone,HOC6H6OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H2O → HOC6H4OH + CO2 How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

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

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O3(g)+ HO(g)→ HO2(g)+ O2(g) Step 2: HO2(g)+ O(g)→ HO(g)+ O2(g) Which species is a catalyst and what type of catalysis is occurring?

A) HO,homogeneous B) HO,heterogeneous C) O3,homogeneous D) O ,heterogeneous A) HO,homogeneous B) HO,heterogeneous C) O3,homogeneous D) O ,heterogeneous

A suggested mechanism for the decomposition of peroxide (H2O2)is H2O2 (aq)2OH (aq) H2O2 (aq)+ OH (aq)H2O (l)+ HO2 (g) HO2 (g)+ OH (aq)H2O (l)+ O2 (g) Which of the following correctly labels the chemical equation for the overall reaction and the reaction intermediates?

A) Overall reaction = H2O2 (aq)H2O (l)+ O2 (g),intermediates = HO2 (aq)+ OH (aq) B) Overall reaction = 3H2O2 (aq)3H2O (l)+ O2 (g),intermediates = OH (aq) C) Overall reaction = 2H2O2 (aq)2H2O (l)+ O2 (g),intermediates = HO2 (aq)+ OH (aq) D) Overall reaction = H2O2 + 2OH (aq)+ HO2 (aq)H2O (l)+ 2OH (aq)+ O2 (g)+ HO2 (aq),intermediates = HO2 (aq)+ OH (aq) A) Overall reaction = H2O2 (aq)H2O (l)+ O2 (g),intermediates = HO2 (aq)+ OH (aq) B) Overall reaction = 3H2O2 (aq)3H2O (l)+ O2 (g),intermediates = OH (aq) C) Overall reaction = 2H2O2 (aq)2H2O (l)+ O2 (g),intermediates = HO2 (aq)+ OH (aq) D) Overall reaction = H2O2 + 2OH (aq)+ HO2 (aq)H2O (l)+ 2OH (aq)+ O2 (g)+ HO2 (aq),intermediates = HO2 (aq)+ OH (aq)

The elementary reaction: 2 HF → H2 + F2,is an example of a ________ reaction.

A) unimolecular B) bimolecular C) termolecular D) tetramolecular A) unimolecular B) bimolecular C) termolecular D) tetramolecular

Exam 13: Chemical Kinetics

Cerium(IV)ion reacts with thallium(I)ion in a one-step reaction shown below. 2 Ce⁴⁺(aq)+ Tl⁺(aq)→ 2 Ce³⁺(aq)+ Tl³⁺(aq) If the rate law is: Rate = k[Ce⁴⁺]⁴[Tl⁺]²,what is the overall order of the reaction?

(Multiple Choice)

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Question 81

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10^-5 M/s.Over the same time interval what is the rate of reaction with respect to B,Δ[B]/Δt?

(Multiple Choice)

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Question 82

If the units for rate are M s^-1,what are the units for the rate constant,k,for a zeroth-order reaction?

(Multiple Choice)

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Question 83

Which statement below regarding the half-life of a second-order reaction is true?

(Multiple Choice)

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Question 84

For the reaction shown below,the rate of reaction of Br^-is ________ times the rate of formation of Br₂ over the same time period. ClO₂^-(aq)+ 4 Br^-(aq)+ 4 H⁺(aq)→ Cl^-(aq)+ 2 Br₂(aq)+2 H₂O(l)

(Short Answer)

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Question 85

The following reaction is first order in A and first order in B: A + B → Products Rate = k[A][B] What is the rate constant k of this reaction in vessel (b)relative to the rate constant k of this reaction in vessel (a)? Each vessel has the same volume.Shaded spheres represent A molecules,and unshaded spheres represent B molecules.

(Multiple Choice)

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Question 86

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10^-5 M/s.Over the same time interval what is the rate of reaction with respect to C,Δ[C]/Δt?

(Multiple Choice)

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Question 87

The following set of data was obtained by the method of initial rates for the reaction: S₂O₈^2-(aq)+ 3 I^-(aq)→ 2 SO₄^2-(aq)+ I₃^-(aq) What is the initial rate when S₂O₈^2- is 0.15 M and I^- is 0.15 M?

(Multiple Choice)

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Question 88

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O₃(g)+ HO(g)→ HO₂(g)+ O₂(g) Step 2: HO₂(g)+ O(g)→ HO(g)+ O₂(g) What is the molecularity of the overall reaction?

(Multiple Choice)

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Question 89

Consider a bimolecular reaction in the gas phase.Which one of the following changes in condition will not cause an increase in the rate of the reaction?

(Multiple Choice)

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Question 90

The rate constant,k,for a first-order reaction is equal to 6.2 × 10^-4 s^-1.What is the half-life for the reaction?

(Multiple Choice)

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Question 91

The following set of data was obtained by the method of initial rates for the reaction: (H₃C)₃CBr + OH^- → (H₃C)₃COH + Br^- What is the value of the rate constant,k?

(Multiple Choice)

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Question 92

Hydroquinone,HOC₆H₆OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H₂O → HOC₆H₄OH + CO₂ How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

(Multiple Choice)

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Question 93

The following reaction is first order in A and first order in B: A + B → Products Rate = k[A][B] What is the rate constant k of this reaction in vessel (b)relative to the rate constant k of this reaction in vessel (a)? Each vessel has the same volume.Shaded spheres represent A molecules,and unshaded spheres represent B molecules.

(Multiple Choice)

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Question 94

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O₃(g)+ HO(g)→ HO₂(g)+ O₂(g) Step 2: HO₂(g)+ O(g)→ HO(g)+ O₂(g) Which species is a catalyst and what type of catalysis is occurring?

(Multiple Choice)

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Question 95

Hydrochloric acid in the hydrolysis of an ester to form an alcohol and a carboxylic acid is an example of a ________ (heterogeneous,homogeneous)catalyst.

(Short Answer)

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Question 96

The first-order reaction,SO₂Cl₂ → SO₂ + Cl₂,has a half-life of 8.75 hours at 593 K.How long will it take for the concentration of SO₂Cl₂ to fall to 12.5% of its initial value?

(Multiple Choice)

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Question 97

The slowest step in a reaction mechanism is called the ________ step.

(Multiple Choice)

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Question 98

A suggested mechanism for the decomposition of peroxide (H₂O₂)is H₂O₂ (aq)2OH (aq) H₂O₂ (aq)+ OH (aq)H₂O (l)+ HO₂ (g) HO₂ (g)+ OH (aq)H₂O (l)+ O₂ (g) Which of the following correctly labels the chemical equation for the overall reaction and the reaction intermediates?

(Multiple Choice)

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Question 99

The elementary reaction: 2 HF → H₂ + F₂,is an example of a ________ reaction.

(Multiple Choice)

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Question 100

Showing 81 - 100 of 190

Exam 13: Chemical Kinetics

Cerium(IV)ion reacts with thallium(I)ion in a one-step reaction shown below. 2 Ce4+(aq)+ Tl+(aq)→ 2 Ce3+(aq)+ Tl3+(aq) If the rate law is: Rate = k[Ce4+]4[Tl+]2,what is the overall order of the reaction?

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10-5 M/s.Over the same time interval what is the rate of reaction with respect to B,Δ[B]/Δt?

If the units for rate are M s-1,what are the units for the rate constant,k,for a zeroth-order reaction?

Which statement below regarding the half-life of a second-order reaction is true?

For the reaction shown below,the rate of reaction of Br - is ________ times the rate of formation of Br2 over the same time period. ClO2-(aq)+ 4 Br-(aq)+ 4 H+(aq)→ Cl-(aq)+ 2 Br2(aq)+2 H2O(l)

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10-5 M/s.Over the same time interval what is the rate of reaction with respect to C,Δ[C]/Δt?

The following set of data was obtained by the method of initial rates for the reaction: S2O82-(aq)+ 3 I-(aq)→ 2 SO42-(aq)+ I3-(aq) What is the initial rate when S2O82- is 0.15 M and I- is 0.15 M?

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O3(g)+ HO(g)→ HO2(g)+ O2(g) Step 2: HO2(g)+ O(g)→ HO(g)+ O2(g) What is the molecularity of the overall reaction?

Consider a bimolecular reaction in the gas phase.Which one of the following changes in condition will not cause an increase in the rate of the reaction?

The rate constant,k,for a first-order reaction is equal to 6.2 × 10-4 s-1.What is the half-life for the reaction?

The following set of data was obtained by the method of initial rates for the reaction: (H3C)3CBr + OH- → (H3C)3COH + Br- What is the value of the rate constant,k?

Hydroquinone,HOC6H6OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H2O → HOC6H4OH + CO2 How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O3(g)+ HO(g)→ HO2(g)+ O2(g) Step 2: HO2(g)+ O(g)→ HO(g)+ O2(g) Which species is a catalyst and what type of catalysis is occurring?

Hydrochloric acid in the hydrolysis of an ester to form an alcohol and a carboxylic acid is an example of a ________ (heterogeneous,homogeneous)catalyst.

The first-order reaction,SO2Cl2 → SO2 + Cl2,has a half-life of 8.75 hours at 593 K.How long will it take for the concentration of SO2Cl2 to fall to 12.5% of its initial value?

The slowest step in a reaction mechanism is called the ________ step.

A suggested mechanism for the decomposition of peroxide (H2O2)is H2O2 (aq)2OH (aq) H2O2 (aq)+ OH (aq)H2O (l)+ HO2 (g) HO2 (g)+ OH (aq)H2O (l)+ O2 (g) Which of the following correctly labels the chemical equation for the overall reaction and the reaction intermediates?

The elementary reaction: 2 HF → H2 + F2,is an example of a ________ reaction.

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Cerium(IV)ion reacts with thallium(I)ion in a one-step reaction shown below. 2 Ce⁴⁺(aq)+ Tl⁺(aq)→ 2 Ce³⁺(aq)+ Tl³⁺(aq) If the rate law is: Rate = k[Ce⁴⁺]⁴[Tl⁺]²,what is the overall order of the reaction?

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10^-5 M/s.Over the same time interval what is the rate of reaction with respect to B,Δ[B]/Δt?

If the units for rate are M s^-1,what are the units for the rate constant,k,for a zeroth-order reaction?

For the reaction shown below,the rate of reaction of Br^-is ________ times the rate of formation of Br₂ over the same time period. ClO₂^-(aq)+ 4 Br^-(aq)+ 4 H⁺(aq)→ Cl^-(aq)+ 2 Br₂(aq)+2 H₂O(l)

Shown is a concentration versus time plot for a reaction involving gases A,B,and C. -Over the time interval 300 to 400 seconds,the rate of reaction with respect to A is Δ[A]/Δt = 3.7 × 10^-5 M/s.Over the same time interval what is the rate of reaction with respect to C,Δ[C]/Δt?

The following set of data was obtained by the method of initial rates for the reaction: S₂O₈^2-(aq)+ 3 I^-(aq)→ 2 SO₄^2-(aq)+ I₃^-(aq) What is the initial rate when S₂O₈^2- is 0.15 M and I^- is 0.15 M?

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O₃(g)+ HO(g)→ HO₂(g)+ O₂(g) Step 2: HO₂(g)+ O(g)→ HO(g)+ O₂(g) What is the molecularity of the overall reaction?

The rate constant,k,for a first-order reaction is equal to 6.2 × 10^-4 s^-1.What is the half-life for the reaction?

The following set of data was obtained by the method of initial rates for the reaction: (H₃C)₃CBr + OH^- → (H₃C)₃COH + Br^- What is the value of the rate constant,k?

Hydroquinone,HOC₆H₆OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H₂O → HOC₆H₄OH + CO₂ How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O₃(g)+ HO(g)→ HO₂(g)+ O₂(g) Step 2: HO₂(g)+ O(g)→ HO(g)+ O₂(g) Which species is a catalyst and what type of catalysis is occurring?

The first-order reaction,SO₂Cl₂ → SO₂ + Cl₂,has a half-life of 8.75 hours at 593 K.How long will it take for the concentration of SO₂Cl₂ to fall to 12.5% of its initial value?

A suggested mechanism for the decomposition of peroxide (H₂O₂)is H₂O₂ (aq)2OH (aq) H₂O₂ (aq)+ OH (aq)H₂O (l)+ HO₂ (g) HO₂ (g)+ OH (aq)H₂O (l)+ O₂ (g) Which of the following correctly labels the chemical equation for the overall reaction and the reaction intermediates?

The elementary reaction: 2 HF → H₂ + F₂,is an example of a ________ reaction.