Consider the reaction products

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

Consider the reaction

\text{A}+\text{B}\rightarrow

products, which proceeds by the following mechanism. Step 1 A

+

\longrightarrow

C (slow) Step 2 C

\longrightarrow

products (fast) The rate constant for Step 1 is

k=2.5\times10^{-2}\,\text{M}^{-1}\,\text{s}^{-1}

. What is the initial rate of the overall reaction when

[\text{A}]=0.050\,\text{M}

and

[\text{B}]=0.10\,\text{M}

? (a)

2.5\times10^{-4}\,\text{M}\,\text{s}^{-1}

(b)

2.5\times10^{-3}\,\text{M}\,\text{s}^{-1}

(c)

1.3\times10^{-4}\,\text{M}\,\text{s}^{-1}

(d)

1.25\times10^{-5}\,\text{M}\,\text{s}^{-1}