Answered: How long would it take for the reactant…

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.45PAE: The initial concentration of the reactant in a tirst-order reaction A —» products is 0.64 rnol/L and...

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Question

How long would it take for the reactant of a first-order reaction to
decrease to one-half its initial concentration if the rate constant is
4.5 X 10^-3 s^-1 and the initial concentration of the reactant is

a. 1.0 M? b. 0.50 M?

Expert Solution

Introduction

This problem can be solved by using the rate law for the first order reaction which is given as ; $k = \frac{2.303}{t} \log \frac{[A_{0}]}{[A]}$ Where k is the rate constant,t is the time,A₀ is initial concentration and A is final concentration.

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