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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Equilibrium exists between butane and isobutane when [butane] = 0.020 M and [isobutane] = 0.050 M. An additional 0.0200 mol/L of isobutane is added to the mixture. What are the concentrations of butane and isobutane after equilibrium has again been attained?

Interpretation Introduction

Interpretation: The concentration of butane and isobutene after equilibrium has again been attained has to be identified.

Concept Introduction: At equilibrium the concentration of the reaction and the product is equated to a constant K, where K is known as the equilibrium

If a reaction is as aA+bBcC+dD ,

The equilibrium constant K=[C]c[D]d[A]a[B]b

Explanation

The concentration of butane and isobutene are given in table.

Equationbutane isobutane
Initial0.0020 0.050
Concentration immediately on adding butane0.00200.0020+0.050
Change in concentration to reestablish equilibrium +xx
equilibrium0.0020+x 0.070-x

The equilibrium constant Kc=[butane][isobutane]=2

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