Chapter 15, Problem 1SAQ

This graph shows the concentration of the reactant A in the reaction $A\to B$ . Determine the average rate of the reaction between 0 and 10 seconds.

• 0.014 M/S
• 0.07 M/S
• 0.86 M/S
• 0.007 M/S

Interpretation Introduction

Interpretation:

To find out the average rate of the reaction between 0 and 10 seconds.

Concept Introduction:

Change in concentration of any product or reactant with respect to time is called as the rate of reaction.

Correct answer:

Option (a) is correct and options (b), (c) and (d), are incorrect.

Explanation of Solution

Reason for the correct option:

The concentrations at 0 s and 10 s are marked as:

The average between 0 and 10 seconds is calculated as:

  $\begin{array}{l}\text{average}\text{rate}\text{=}\text{-}\frac{\text{Δ}\left[\text{A}\right]}{\left[\text{Δt}\right]}\\ \text{=}\text{-}\frac{\left[\text{1 }\text{M-0}\text{.86 }\text{M}\right]}{\left[\text{0}\text{s-10}\text{s}\right]}\\ \text{=}\text{0}\text{.014}\text{M/s}\end{array}$

Thus, option (a) is correct.