Question

A reaction is first-order with respect to the concentration of a solute in an aqueous solution with a rate constant of k = 1.40 x 10^-6 s^-1. What is the rate of the reaction when the concentration of the solute is 0.616 M?"

Answer 1

The rate of a first-order reaction with a rate constant of 1.40 x 10^-6 s^-1 and a reactant concentration of 0.616 M is calculated to be approximately 8.62 x 10^-7 M/s using the equation rate = k[A].

Step-by-step explanation:

The student is asking about the rate of a first-order reaction with a given rate constant and reactant concentration. To calculate the reaction rate, we use the first-order rate equation:

rate = k[A]

In which k is the rate constant, and [A] is the concentration of the reactant. Given that k = 1.40 x 10-6 s-1 and [A] = 0.616 M, we substitute into the equation:

rate = (1.40 x 10-6 s-1)(0.616 M)

Thus, the rate is approximately 8.62 x 10-7 M/s.