Question

Chemical A breaks down into chemical B. At t=0, [A] = 0.100 M. At t=10.0 s, [A] = 0.075 M. What is the average reaction rate?

Answer 1

The average reaction rate of Chemical A breaking down into Chemical B in 10 seconds is calculated by dividing the change in concentration of Chemical A (0.025 M) by the time interval (10 s), resulting in an average reaction rate of 0.0025 M/s.

Step-by-step explanation:

The average reaction rate for a chemical reaction is calculated by taking the change in concentration of the reactant over a certain period of time. In this case, the starting concentration of Chemical A ([A]) is 0.100 M and after 10 seconds the concentration is 0.075 M. The average reaction rate is found using the formula:

Average reaction rate = Δ[A] / Δt

where Δ[A] is the change in concentration of A, and Δt is the change in time. Plugging the values into the formula, we find:

Δ[A] = [A]initial - [A]final = 0.100 M - 0.075 M = 0.025 M

Δt = 10.0 s - 0.0 s = 10.0 s

Average reaction rate = 0.025 M / 10.0 s = 0.0025 M/s

This value represents the average rate at which Chemical A breaks down into Chemical B over the 10-second interval.