   Chapter 17, Problem 19QAP ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem

# . Suppose that for the reaction PCl 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g )    it is determined, at a particular temperature. that the equilibrium concentrations are [ PCl 5 ( g ) ] = 0.0711 M ,     [ PCl 3 ( g ) ] = 0.0302 M , and [ Cl 2 ( g ) ] = 0.0491 M . Calculate the value of K for he reaction at this temperature.

Interpretation Introduction

Interpretation:

The value of K for the given reaction is to be calculated.

Concept Introduction:

The equilibrium constant of a reaction is expressed as the ratio of concentration of products and reactants each raised to the power of their stoichiometric coefficients. A general equilibrium reaction is represented as,

aA+bBcC+dD

The equilibrium constant for the above chemical reaction is expressed as,

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

Where,

• [A] represents the equilibrium concentration of reactant A.
• [B] represents the equilibrium concentration of reactant B.
• [C] represents the equilibrium concentration of product C.
• [D] represents the equilibrium concentration of product D.
• a represents the stoichiometric coefficient of reactant A.
• b represents the stoichiometric coefficient of reactant B.
• c represents the stoichiometric coefficient of product C.
• d represents the stoichiometric coefficient of product D.
Explanation

The equilibrium concentration of PCl5 is 0.0711M.

The equilibrium concentration of PCl3 is 0.0302M.

The equilibrium concentration of Cl2 is 0.0491M.

The given equation is represented as,

PCl5(g)PCl3(g)+Cl2(g)

The equilibrium constant for the above chemical reaction is expressed as,

K=[PCl3][

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