Chapter 8, Problem 21P

Interpretation Introduction

(a)

Interpretation:

The mixture whose particle size is $1.5\times {10}^{-7}\text{ m}$ should be classified into either solution colloid or suspension.

Concept introduction:

The solution is defined as usually a homogenous mixture of two liquids whose particle size is less than $1\text{ nm}$.

The colloids are the class of mixtures that have particles size much greater than the solutions. They can be clearly distinguished because of the presence of particles that constitute the dispersed phase of the colloidal systems and render them opaque. Butter milk is an example of colloids. There are various subcategories of colloids such as sol, foam, aerosol, emulsions. The particle size of colloids lies in the range of ${10}^{-9}-{10}^{-7}\text{ m}$.

The heterogeneous mixtures are essentially those mixtures that have non-uniform composition. The average particle size of heterogeneous mixture or suspension is more than $1\text{ μm}$ . The suspension is subclass of heterogeneous mixture whose particles are large and do not dissolve into the solvent to give a uniform composition.

Answer to Problem 21P

The mixture whose particle size is $1.5\times {10}^{-7}\text{ m}$ is a colloid.

Explanation of Solution

The colloids are the class of mixtures that have particles size much greater than the solutions. The particle size of colloids lies in the range of ${10}^{-9}-{10}^{-7}\text{ m}$ . Therefore, the mixture whose particle size is $1.5\times {10}^{-7}\text{ m}$ is a colloid.

Interpretation Introduction

(b)

Interpretation:

The mixture whose particle size is $2\times {10}^{-5}\text{ m}$ should be classified into either solution colloid or suspension.

Concept introduction:

The solution is defined as usually a homogenous mixture of two liquids whose particle size is less than $1\text{ nm}$.

The colloids are the class of mixtures that have particles size much greater than the solutions. They can be clearly distinguished because of the presence of particles that constitute the dispersed phase of the colloidal systems and render them opaque. Butter milk is an example of colloids. There are various subcategories of colloids such as sol, foam, aerosol, emulsions. The particle size of colloids lies in the range of ${10}^{-9}-{10}^{-7}\text{ m}$.

The heterogeneous mixtures are essentially those mixtures that have non-uniform composition. The average particle size of heterogeneous mixture or suspension is more than $1\text{ μm}$ . The suspension is subclass of heterogeneous mixture whose particles are large and do not dissolve into the solvent to give a uniform composition.

Answer to Problem 21P

The mixture whose particle size is $2\times {10}^{-5}\text{ m}$ is a suspension.

Explanation of Solution

The suspension is subclass of heterogeneous mixture whose particles are large and are usually more than $1\text{ μm}$ . The mixture whose particle size is $2\times {10}^{-5}\text{ m}$ is larger than $1\text{ μm}$ . Therefore, the mixture must be a suspension.

Interpretation Introduction

(c)

Interpretation:

The mixture whose particle size is $1.2\times {10}^{-10}\text{ m}$ should be classified into either solution colloid or suspension.

Concept introduction:

The solution is defined as usually a homogenous mixture of two liquids whose particle size is less than $1\text{ nm}$ .one nanometers is equal to ${10}^{-9}\text{ nm}$.

The colloids are the class of mixtures that have particles size much greater than the solutions. They can be clearly distinguished by the presence of particles that constitute the dispersed phase of the colloidal systems and render them opaque. Butter milk is an example of colloids. There are various subcategories of colloids such as sol, foam, aerosol, emulsions.

The heterogeneous mixtures are essentially those mixtures thathave non-uniform composition. The average particle size of heterogeneous mixture is more than $1\text{ μm}$ . The suspension is subclass of heterogeneous mixture whose particles are large and do not dissolve into the solvent to give a uniform composition.

Answer to Problem 21P

The mixture whose particle size is $1.2\times {10}^{-10}\text{ m}$ is a solution.

Explanation of Solution

The solution is defined as a homogenous mixture whose particle size is less than $1\text{ nm}$ .The mixture whose particle size is $1.2\times {10}^{-10}\text{ m}$ is less than $1\text{ nm}$ . Therefore, the mixture must be solution.