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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

The reaction

PCl5(g) ⇄ PCl3(g) + Cl2(g)

was examined at 250 °C. At equilibrium, [PCl5] = 4.2 × 10‒5 mol/L, [PCl3] = 1.3 × 10‒2 mol/L, and [Cl2] = 3.9 × 10−3 mol/L. Calculate Kc, for the reaction.

Interpretation Introduction

Interpretation: Interpretation:

The equilibrium constant for the given reaction 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

From the table given below,

EquationPCl5 PCl3 Cl2
Equilibrium4.2×105 1.3×102 3.9×103

Kc can be calculated as

K<

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