Chapter 14.1, Problem 8SSC

Interpretation Introduction

Interpretation:

Properties of suspension, colloids and solutions have to be written in tabular form.

Concept introduction:

A solution is a homogeneous mixture of two or more components. The solute particles are fully dissolved in the dispersion medium. The components of a solution are atoms, ions, or molecules which are smaller in diameter.

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. The particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas. The dispersed particles of a colloid are intermediate in size between those of a solution and a suspension. Due to intermediate size of the dispersed particles, they do not settle out from the dispersion medium upon standing.

A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particle size in a suspension are much larger than those of a solution, so they easily settle out from the dispersion medium due to the gravity.

Answer to Problem 8SSC

A solution is a homogeneous mixture of two or more components.

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension.

A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing.

Explanation:

Solution	Colloids	Suspensions
Homogeneous mixture	Heterogeneous mixture	Heterogeneous mixture
Particle size: 0.01 – 1nm ; atoms, ions or molecules	Particle size: 1 – 100nm, dispersed; large molecules or aggregates	Particle size: over 100nm, suspended: large particles or aggregates
Pass easily through ordinary filter paper and also through the animal membrane	Pass easily through ordinary filter paper but not through the animal membrane	Do not even pass through ordinary filter paper
Do not settle down on standing	Do not settle downon standing	Particles settle out on standing
Cannot be separated by filtration	Cannot be separated by filtration	Can be separated by filtration
Do not show Brownian motion	Show Brownian motion	Do not show Brownian motion
Do not scatter light	Scatter light (Tyndall effect)	May either scatter light or be opaque
Diffuse quickly	Diffuse slowly	Do not diffuse
Salt dissolved in water is an example of true solution	Milk is an example of colloid	Muddy water is an example of suspension

• A solution is a homogeneous mixture.
• A colloid is a heterogeneous mixture.
• A suspension is a heterogeneous mixture.

Explanation of Solution

Solution	Colloids	Suspensions
Homogeneous mixture	Heterogeneous mixture	Heterogeneous mixture
Particle size: 0.01 – 1nm ; atoms, ions or molecules	Particle size: 1 – 100nm, dispersed; large molecules or aggregates	Particle size: over 100nm, suspended: large particles or aggregates
Pass easily through ordinary filter paper and also through the animal membrane	Pass easily through ordinary filter paper but not through the animal membrane	Do not even pass through ordinary filter paper
Do not settle down on standing	Do not settle downon standing	Particles settle out on standing
Cannot be separated by filtration	Cannot be separated by filtration	Can be separated by filtration
Do not show Brownian motion	Show Brownian motion	Do not show Brownian motion
Do not scatter light	Scatter light (Tyndall effect)	May either scatter light or be opaque
Diffuse quickly	Diffuse slowly	Do not diffuse
Salt dissolved in water is an example of true solution	Milk is an example of colloid	Muddy water is an example of suspension

Conclusion

• A solution is a homogeneous mixture.
• A colloid is a heterogeneous mixture.
• A suspension is a heterogeneous mixture.