   Chapter 14, Problem 160AE

Chapter
Section
Textbook Problem

# Calculate the value for the equilibrium constant for each of the following aqueous reactions.a. NH 3 +H 3 O + ⇌ NH 4 + +H 2 O b. NO 2 − + H 3 O + ⇌ HNO 2 + H 2 O c. NH 4 + + OH − ⇌ NH 3 + H 2 O d. HNO 2 + OH − ⇌ H 2 O+NO 2 −

(a)

Interpretation Introduction

Interpretation: The equilibrium constant is to be calculated for each reaction.

Concept introduction: The Kb equilibrium constant is the ratio of product of equilibrium concentrations of product to the equilibrium concentration of reactant base.

To determine: The equilibrium constant for the given reaction.

Explanation

Explanation

The given reaction is,

NH3+H3O+NH4++H2O

Formula

The expression for the equilibrium constant for the given reaction is,

K=[NH4+][NH3][H3O+]

Multiply [OH] in the numerator and denominator of right hand side,

K=[NH4+][NH3][H3O+]×[OH][OH]=[NH4+][OH][NH

(b)

Interpretation Introduction

Interpretation: The equilibrium constant is to be calculated for each reaction.

Concept introduction: The Kb equilibrium constant is the ratio of product of equilibrium concentrations of product to the equilibrium concentration of reactant base.

To determine: The equilibrium constant for the given reaction.

(c)

Interpretation Introduction

Interpretation: The equilibrium constant is to be calculated for each reaction.

Concept introduction: The Kb equilibrium constant is the ratio of product of equilibrium concentrations of product to the equilibrium concentration of reactant base.

To determine: The equilibrium constant for the given reaction.

(d)

Interpretation Introduction

Interpretation: The equilibrium constant is to be calculated for each reaction.

Concept introduction: The Kb equilibrium constant is the ratio of product of equilibrium concentrations of product to the equilibrium concentration of reactant base.

To determine: The equilibrium constant for the given reaction.

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