Types of Solutions

Types of Solutions
C11-4-01


The purpose of this lab is to:

1. 
   Classify different solutions as one of nine types depending on its solute and solvent phase.
   

2. 
   Provide other examples of the nine solution types.
   

3. 
   Determine whether the given mixtures are true solutions or colloidal dispersions.
   

Introduction:

Consider for a moment what is meant by the word solution. What is an example of a solution that first comes to mind?

What would be your response if you were told that smoke particles in air are a solution?

Solutions are of extreme importance in everyday life in that they comprise some of the foods we eat and many of the drinks we consume, and they also form the basis of many household products such as cleansers, disinfectants, coatings and medications. We often think that only things like salt dissolving in water are a solution when, in fact, things like smoke particles suspended in the air are also solutions.

A solution is defined as a homogeneous mixture containing a solute and a solvent. The solute (the substance being dissolved) is present in the lesser amount in the solution, while the solvent (the substance that dissolves the solute) is present in the larger amount. At the molecular level, molecules and ions of a solute are completely mixed with and interact with those of the solvent when a solute dissolves in a solvent. This type of mixing is homogeneous because no boundary is visible in the entire solution. This interaction occurs because of electrostatic attractions between the solute and solvent.

An example is table salt (NaCl) dissolving into water. Click on the link below to view the dissolving process at the molecular level. Note that the molecular nature of the water and sodium and chloride ions allows the dissolving to occur and the solution to result.