Chemistry for Engineering Students
Chemistry for Engineering Students
3rd Edition
ISBN: 9781285199023
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Chapter 12, Problem 12.76PAE

(a)

Interpretation Introduction

To determine:

Write chemical equations and equilibrium, expressions for the reactions of ammonia with water.

(a)

Expert Solution
Check Mark

Explanation of Solution

NH3(g)+H2O(l)NH4+(aq)+OH(aq)

Apply the concept

aA+bBcC+dD

Rate of equilibrium reaction (K)=[C]c[D]d[A]a[B]b

So, here, rate of equilibrium reaction (K)=[NH4+][OH][NH3][H2O].

In this equilibrium, water is pure liquid and its concentration is constant [H2O]=1

Dissociation constant (Ka)=[NH4+][OH][NH3]

(b)

Interpretation Introduction

To determine:

Write chemical equations of equilibrium expressions for the reactions of methylamine. With water.

(b)

Expert Solution
Check Mark

Explanation of Solution

CH3NH2(aq)+H2O(l)CH3NH3+(aq)+OH(aq)

Apply the concept

aA+bBcC+dD

Rate of equilibrium reaction (K)=[C]c[D]d[A]a[B]b

Rate of equilibrium reaction (K)=[CH3NH3+](OH)[CH3NH2][H2O].

In this equilibrium, [H2O]=1

Dissociation constant (Ka)=[CH3NH3+](OH)[CH3NH2]

(c)

Interpretation Introduction

To determine: Write chemical equations and equilibrium expressions for weak bases acetate ion C3COO with water.

(c)

Expert Solution
Check Mark

Explanation of Solution

CHOO(aq)+H2O(l)CH3COOH(aq)+OH(aq)

Apply the concept

aA+bBcC+dD

Rate of equilibrium reaction (K)=[C]c[D]d[A]a[B]b

Rate of equilibrium constant is as (K)=[CH3COOH][OH][CHOO][H2O].

In this equilibrium, [H2O]=1

Dissociation constant (Ka)=[CH3COOH][OH][CHOO]

(d)

Interpretation Introduction

To determine: Write chemical equations and equilibrium expressions for hydrogen carbonate ion HCo3 with water.

(d)

Expert Solution
Check Mark

Explanation of Solution

HCo3(aq)+H2O(l)H2Co3(aq)+OH(aq)

Rate of equilibrium constant for reaction

aA+bBcC+dD

Rate of equilibrium reaction (K)=[C]c[D]d[A]a[B]b

Rate of equilibrium constant is as (K)=[H2Co3][OH][HCo3][H2O]

In this equilibrium, [H2O]=1

Dissociation constant (Ka)=[H2Co3][OH][HCo3]

[H2Co3][OH]=Ka[HCo3]

(e)

Interpretation Introduction

To determine: Write chemical equations and equilibrium expressions for aniline ion C6H5NH2 with water.

(e)

Expert Solution
Check Mark

Explanation of Solution

C6H5NH2(aq)+H2O(l)C6H5NH3+(aq)+OH(aq)

Apply the concept

Rate of equilibrium constant for reaction

aA+bBcC+dD

Rate of equilibrium reaction (K)=[C]c[D]d[A]a[B]b

Rate of equilibrium constant is as (K)=[C6H5NH3+][OH][C6H5NH2][H2O]

In this equilibrium, [H2O]=1

Dissociation constant (Ka)=[C6H5NH3+][OH][C6H5NH2]

[C6H5NH3+][OH]=Ka[C6H5NH2]

Conclusion

Hence, all the parts have been described.

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Chapter 12 Solutions

Chemistry for Engineering Students

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