Consider a simple reaction in which a reactant A forms...

Name: Problem 8, Chapter 14: Chemistry: Structure and Properties
Uploaded: 2019-03-23T17:19:22-08:00
Duration: 2 min 28 s
Channel: Eugene Schneider
Description: Consider a simple reaction in which a reactant A forms products: What is the rate law if the reaction is zero order with respect to A? First order? Second order? For each case, explain how a doubling of the concentration of A would affect the rate of reaction.

Consider a simple reaction in which a reactant A forms products: What is the rate law if the reaction is zero order with respect to A? First order? Second order? For each case, explain how a doubling of the concentration of A would affect the rate of reaction.

Key Concepts

Rate Law

The rate law is an equation that expresses the reaction rate as a function of the concentration of reactants. It is generally written as Rate = k[A]^n, where k is the rate constant, [A] is the concentration of the reactant, and n is the reaction order with respect to A.

Reaction Order

The reaction order, indicated by the exponent n in the rate law, describes how the rate of reaction is affected by the concentration of the reactant. It provides insight into the dependency of the process on the concentration of each reactant involved.

Zero Order Kinetics

In zero order kinetics, the reaction rate is independent of the concentration of the reactant. The rate law simplifies to Rate = k. Therefore, doubling the concentration of the reactant does not affect the rate of the reaction; it remains constant.

First Order Kinetics

For a first order reaction, the rate is directly proportional to the concentration of the reactant, expressed as Rate = k[A]. Thus, if the concentration of the reactant is doubled, the rate of reaction also doubles.

Second Order Kinetics

A second order reaction has a rate that is proportional to the square of the reactant's concentration, given by Rate = k[A]^2. As a result, doubling the concentration of the reactant will increase the rate by a factor of four (2^2 = 4).

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