Chapter 14.7, Problem 1PPA

Practice ProblemATTEMPT

The reaction $2\text{A}\to \text{B}$ is second order in A with a rate constant of $32.0M^{\text{-1}}\cdot {\text{s}}^{\text{-1}}\text{ at 25}\text{.0ºC}$. (a) Starting with ${\left[\text{A}\right]}_0=0.0075M,$ how long will it take for the concentration of A to drop to $0.0018M?$ (b) Calculate the half-life of the reaction for ${\left[\text{A}\right]}_0=0.0075M$ and for ${\left[\text{A}\right]}_0=0.0025M.$