Chemical Kinetics and Half Life
Chapter 15-4
	Dr. Robert Belford & Xiaomin Tu

Question 1

For the first order reaction A + B ---> C, the initial concentration of A is 0.26M, how long it must take for the concentration of A to reduce to 0.176M? k=0.33min^-1

(A) 0.18

(B) 0.76

(C) 1.18

(D) 2.08

Hint

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Question 2

If the initial concentration of the reactant of a first order reaction is 0.135M, what is the concentration after 1.5s. k=0.75s^-1

(A) 0.044

(B) 0.89

(C) 1.67

(D) 2.34

Hint

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Question 3

The rate constant for a second-order reaction is 0.26M^-1s^-1, if the initial concentration of the reactant is 0.26M, how long it must take for the concentration to drop to 0.13M?

(A) 9.06

(B) 12.58

(C) 14.79

(D) 18.22

Hint

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Question 4

What is the rate constant of a first order reaction that has a half-life of 144s?

(A) 2.8e-3

(B) 3.8e-3

(C) 4.8e-3