   Chapter 14, Problem 78GQ

Chapter
Section
Textbook Problem

Hydrogen peroxide, H2O2(aq), decomposes to H2O(ℓ) and O2(g)2 H2O2(aq) → 2 H2O(ℓ) + O2(g)At a particular temperature, the following data were collected for the initial rate of appearance O2. (a) What is the rate law for this reaction?(b) Calculate the value of the rate constant for this reaction.(c) If the chemical equation for this reaction is written asH2O2(aq) → H2O(ℓ) + ½ O2(g)what is the value of the rate constant?

(a)

Interpretation Introduction

Interpretation:

The rate law has to be determined for the given reaction.

Concept introduction:

Rate law: It is an equation that related to the dependence of the reaction rate on the concentration of each substrate (reactants).

For a reaction,

aA+bB+cCProducts

Where,

A and B are reactants

a and b are stoichiometric coefficients

Rate=-Δ[A]Δt=k[A]x[B]y[C]z

Where,

k is the rate constant

Rate constant: Rate constant is an expression used to relate the rate of a reaction to the concentration of reactants participating in the reaction.

Explanation

Given information,

The reaction is 2H2O2(aq)2H2O(l)+O2(aq)

[H2O2](mol/L)InitialReactionRate(molO2/L.min)0.05005.30×1050.1001.06×1040.2002

(b)

Interpretation Introduction

Interpretation:

The value of rate has to be determined for the given reaction.

Concept introduction:

Rate law: It is an equation that related to the dependence of the reaction rate on the concentration of each substrate (reactants).

For a reaction,

aA+bB+cCProducts

Where,

A and B are reactants

a and b are stoichiometric coefficients

Rate=-Δ[A]Δt=k[A]x[B]y[C]z

Where,

k is the rate constant

Rate constant: Rate constant is an expression used to relate the rate of a reaction to the concentration of reactants participating in the reaction.

(c)

Interpretation Introduction

Interpretation:

The value of rate has to be determined for the given reaction.

Concept introduction:

Rate law: It is an equation that related to the dependence of the reaction rate on the concentration of each substrate (reactants).

For a reaction,

aA+bB+cCProducts

Where,

A and B are reactants

a and b are stoichiometric coefficients

Rate=-Δ[A]Δt=k[A]x[B]y[C]z

Where,

k is the rate constant

Rate constant: Rate constant is an expression used to relate the rate of a reaction to the concentration of reactants participating in the reaction.

Rate constant for a particular reaction is always constant. It does not depend on the concentration of the reactant.

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