Interpretation: A solution, a colloid, and a suspension need to be distinguished.
Concept Introduction: A solution is a homogenous mixture of two or more substances. Here, the size of particles is in the range of 0.01-1 nm. A colloid can be defined as a heterogeneous substance (non-crystalline) where large molecules or particles of a substance are dispersed through another substance. In a colloid, particles do not settle and the separation of particles of one substance from other cannot be done by filtering or centrifuging process. A suspension is a heterogenous mixture where particles can settle out from the mixture if it is standing undisturbed. The size of particles in a suspension is larger than those of a solution. Since different substances in the mixture are not uniformly distributed, thus, suspensions are considered to be heterogenous mixtures.
Explanation of Solution
The differences between a solution, a colloid, and a suspension can be represented as follows:
Solution | Colloid | Suspension |
Homogenous | Heterogenous | Heterogeneous |
Size of particles ranges from 0.01-1 nm. | Size of particles ranges from 1-1000 nm. | Size of the particles is above 1000 nm. |
Does not show Tyndall effect or does not scatter light. | It shows Tyndall effect. | Can show Tyndall effect |
The particles cannot be separated by filtration method. | The particles cannot be separated by filtration method. | Can be separated by filtration. |
Particles do not get separated on standing. | Particles do not get separated on standing. | Particles do get settled out. |
Chapter 15 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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