Chapter 19.5, Problem 4PPA

Interpretation Introduction

Interpretation:

Time taken to decrease the concentration of $\text{A}$ from $1.25M$ to $0.71M$ for the given reaction should be calculated.

Concept introduction:

For a first order reaction, $A\underset{}{\to }B+C$ the rate constant is,

$\begin{array}{c}\ln \frac{{\left[A\right]}_t}{{\left[A\right]}_0}=-kt\\ where,{\left[A\right]}_0=\text{concentration}\text{of}\text{reactant}atstartingtime\left(t=0\right)\\ {\left[A\right]}_t=\text{concentration}\text{of}\text{reactant}afterttime\\ k=r\text{ate}\text{constant}\\ \text{t}\text{=}\text{time}\end{array}$