The integrated rate law allows chemists to predict the reactant concentration after a certain amount of time,
Question:
The integrated rate law allows chemists to predict the reactant concentration after a certain amount of time, or the time it would take for a certain concentration to be reached. The integrated rate law for a first-order reaction is:
Now say we are particularly interested in the time it would take for the concentration to become one-half of its initial value. Then we could substitute for A and rearrange the equation to:
This equation calculates the time required for the reactant concentration to drop to half its initial value. In other words, it calculates the half-life.
Half-life equation for first-order reactions:
where t1/2 is the half-life in seconds (s), and k is the rate constant in invers (s-1).
Part A
To calculate the half-life, plug the value for k into the half-life equation a What is the half-life of a first-order reaction with a rate constant of 8.60 Express answer with the appropriate units.
Smith and Roberson Business Law
ISBN: 978-0538473637
15th Edition
Authors: Richard A. Mann, Barry S. Roberts