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Chapter 12: Q2. (page 398)

The hypothetical elementary reaction 2A鈫�B+Chas a rate constant of 10鈥�6M鈥�1s鈥�1. What is the reaction velocity when the concentration of A is 10mM?

Short Answer

Expert verified

The reaction velocity for the hypothetical elementary reaction 2A鈫�B+C is 10-10Ms-1.

Step by step solution

01

Introduction

The pace of an elementary reaction is proportional to the frequency with which the reacting molecules come in contact with each other at a constant temperature. Thus, the rate constant of an elementary reaction can be used to calculate the reaction velocity.

02

Formula to calculate reaction velocity

For a bimolecular reaction, the reaction velocity is calculated as

v=k[A]2

Where

vis reaction velocity.

Kis reaction constant.

Ais the concentration of A.

03

Calculation

It is given

Concentration of A=10mM (0.01M)

Rate constant=10-6M-1s-1

On substituting the values,

v=k[A]2

=10-6 x (0.010M)2

=10-10Ms-1

Thus, for the hypothetical elementary reaction, the reaction velocity is 10-10Ms-1.

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