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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

Kc = 5.6 × 10−12 at 500 K for the dissociation of iodine molecules to iodine atoms.

I2(g) ⇄ 2 I(g)

A mixture has [I2] = 0.020 mol/Land [I] = 2.0 × 10−8 mol/L. Is the reaction at equilibrium (at 500 K)? If not, which way must the reaction proceed to reach equilibrium?

Interpretation Introduction

Interpretation:

The given reaction is in equilibrium or not has to be determined and way to proceed to reach equilibrium has to be identified.

Concept Introduction:

For a reaction, aA+bBcC+dD ,

The reaction quotient,Q=[C]c[D]d[A]a[B]b

Q<K, means some reactants must convert to products for the reaction to reach equilibrium. This will decrease concentration of the reactant and will increase concentration of the products.

Q>K, means some products must convert to reactants for the reaction to reach equilibrium. This will increase concentration of the reactant and will decrease concentration of the products.

Explanation

Given Kc=5.6×10-12mol/L

The reaction quotient,Q=(2.0×10-8mol/L)20

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