Question

question 3 (1 point)
consider the following reaction mechanism. changing the concentration of which substance(s) would have the most effect on the rate of the overall reaction?
2a --> b + 2c (slow)
b + c --> d + e (fast)
c + d --> e + f (fast)
a
a and c
b
d
d and e

Explanation:

Step1: Rate - determining step

The rate of a reaction mechanism is determined by the slowest step. In this case, the first step \(2A
ightarrow B + 2C\) is slow.

Step2: Rate law

The rate law for an elementary reaction (like the slow step here) is based on the stoichiometry of the reactants. For the reaction \(2A
ightarrow B + 2C\), the rate law is \(rate = k[A]^{2}\).

Answer:

A.