Chapter 16, Problem 16.65QP

(a)

Interpretation Introduction

Interpretation:

The given species has to be classified as weak or strong base

Concept Information:

Strong base and weak base:

Strong bases are formed from alkali metals and alkaline earth metals of Group IA and IIA respectively.

For Group IA metal hydroxides, the hydroxide ion concentration is simply the initial concentration of the strong base

For Group IIA metal hydroxides, the hydroxide ion concentration at equilibrium will be twice that of the initial concentration of strong base

Strong base dissociates into its constituent ions fully. It produces more of hydroxide ions while dissolved in water.  Weak bases partially dissociates into its constituent ions.

According to Bronsted-Lowry, strong base is a good proton acceptor whereas weak base is a poor proton acceptor

Strong and weak base can be determined based on their equilibrium constant ${\text{K}}_b$

• When the ${\text{K}}_b$ is large, it indicates strong base
• When the ${\text{K}}_b$ is small, it indicates weak base

To Classify: The given $\text{LiOH}$ is a strong or weak base

(b)

Interpretation Introduction

Interpretation:

The given species has to be classified as weak or strong base

Concept Information:

Strong base and weak base:

Strong bases are formed from alkali metals and alkaline earth metals of Group IA and IIA respectively.

For Group IA metal hydroxides, the hydroxide ion concentration is simply the initial concentration of the strong base

For Group IIA metal hydroxides, the hydroxide ion concentration at equilibrium will be twice that of the initial concentration of strong base

Strong base dissociates into its constituent ions fully. It produces more of hydroxide ions while dissolved in water.  Weak bases partially dissociates into its constituent ions.

According to Bronsted-Lowry, strong base is a good proton acceptor whereas weak base is a poor proton acceptor

Strong and weak base can be determined based on their equilibrium constant ${\text{K}}_b$

• When the ${\text{K}}_b$ is large, it indicates strong base
• When the ${\text{K}}_b$ is small, it indicates weak base

To Classify: The given ${\text{CN}}^{\text{-}}$ is a strong or weak base

(c)

Interpretation Introduction

Interpretation:

The given species has to be classified as weak or strong base

Concept Information:

Strong base and weak base:

Strong bases are formed from alkali metals and alkaline earth metals of Group IA and IIA respectively.

For Group IA metal hydroxides, the hydroxide ion concentration is simply the initial concentration of the strong base

For Group IIA metal hydroxides, the hydroxide ion concentration at equilibrium will be twice that of the initial concentration of strong base

Strong base dissociates into its constituent ions fully. It produces more of hydroxide ions while dissolved in water.  Weak bases partially dissociates into its constituent ions.

According to Bronsted-Lowry, strong base is a good proton acceptor whereas weak base is a poor proton acceptor

Strong and weak base can be determined based on their equilibrium constant ${\text{K}}_b$

• When the ${\text{K}}_b$ is large, it indicates strong base
• When the ${\text{K}}_b$ is small, it indicates weak base

To Classify: The given ${\text{H}}_{\text{2}}\text{O}$ is a strong or weak base

(d)

Interpretation Introduction

Interpretation:

The given species has to be classified as weak or strong base

Concept Information:

Strong base and weak base:

Strong bases are formed from alkali metals and alkaline earth metals of Group IA and IIA respectively.

For Group IA metal hydroxides, the hydroxide ion concentration is simply the initial concentration of the strong base

For Group IIA metal hydroxides, the hydroxide ion concentration at equilibrium will be twice that of the initial concentration of strong base

Strong base dissociates into its constituent ions fully. It produces more of hydroxide ions while dissolved in water.  Weak bases partially dissociates into its constituent ions.

According to Bronsted-Lowry, strong base is a good proton acceptor whereas weak base is a poor proton acceptor

Strong and weak base can be determined based on their equilibrium constant ${\text{K}}_b$

• When the ${\text{K}}_b$ is large, it indicates strong base
• When the ${\text{K}}_b$ is small, it indicates weak base

To Classify: The given ${\text{ClO}}_{\text{4}}{}^{\text{-}}$ is a strong or weak base

(e)

Interpretation Introduction

Interpretation:

The given species has to be classified as weak or strong base

Concept Information:

Strong base and weak base:

Strong bases are formed from alkali metals and alkaline earth metals of Group IA and IIA respectively.

For Group IA metal hydroxides, the hydroxide ion concentration is simply the initial concentration of the strong base

For Group IIA metal hydroxides, the hydroxide ion concentration at equilibrium will be twice that of the initial concentration of strong base

Strong base dissociates into its constituent ions fully. It produces more of hydroxide ions while dissolved in water.  Weak bases partially dissociates into its constituent ions.

According to Bronsted-Lowry, strong base is a good proton acceptor whereas weak base is a poor proton acceptor

Strong and weak base can be determined based on their equilibrium constant ${\text{K}}_b$

• When the ${\text{K}}_b$ is large, it indicates strong base
• When the ${\text{K}}_b$ is small, it indicates weak base

To Classify: The given ${\text{NH}}^{\text{-}}{}_{\text{2}}$ is a strong or weak base