   # Which of the following statement(s) is( are) true? a. The half-life for a zero-order reaction increases as the reaction proceeds. b. A catalyst does not change the value of the rate constant c. The half-life for a reaction, aA → Products that is first order in A increases with increasing [A] 0 . d. The half-life for a second-order reaction increases as the reaction proceeds. ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 11, Problem 99CWP
Textbook Problem
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## Which of the following statement(s) is( are) true?a. The half-life for a zero-order reaction increases as the reaction proceeds.b. A catalyst does not change the value of the rate constantc. The half-life for a reaction, aA → Products that is first order in A increases with increasing [A]0.d. The half-life for a second-order reaction increases as the reaction proceeds.

(a)

Interpretation Introduction

Interpretation: To justify if the given statements are true or false.

Concept introduction: The buffer solution is a solution contains weak acid and conjugate base or weak base and conjugated acid. It resists the change in pH .

To determine: The authenticity of the given statement, “The half-life for a zero order reaction increases as the reaction proceeds”.

### Explanation of Solution

Explanation

The zero order reaction is the reaction in which the rate is independent of the concentration of the reactants.

The half-life of the zero order reaction is determined by the given formula,

t1/2=a2k0

Where,

• t1/2 is the half-life.
• a is the concentration.
• k0 is the rate constant.

From the above expression it is clear that the half-life of the zero order reaction is directly proportional to the concentration

(b)

Interpretation Introduction

Interpretation: To justify if the given statements are true or false.

Concept introduction: The buffer solution is a solution contains weak acid and conjugate base or weak base and conjugated acid. It resists the change in pH .

To determine: The authenticity of the given statement, “A catalyst does not change the value of the rate constant”.

(c)

Interpretation Introduction

Interpretation: To justify if the given statements are true or false.

Concept introduction: The buffer solution is a solution contains weak acid and conjugate base or weak base and conjugated acid. It resists the change in pH .

To determine: The authenticity of the given statement, “The half-life for a reaction aAProducts , that is first order in A increases with increasing [A]0 ”.

(d)

Interpretation Introduction

Interpretation: To justify if the given statements are true or false.

Concept introduction: The buffer solution is a solution contains weak acid and conjugate base or weak base and conjugated acid. It resists the change in pH .

To determine: The authenticity of the given statement, “The half-life foe a second-order reaction increases as the reaction proceeds”.

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