1. Mixtures Lecture
Chapter 2: Section 1

2. Mixtures, Solutions, and Suspensions
A mixture is a combination of two or more substances NOT combined chemically.
May be a mixture of both elements and compounds
Substances keep their unique properties and can be separated by physical means.

3. Mixtures, Solutions, and Suspensions
There are two types of mixtures . . .
Heterogeneous – the parts of the mixture are noticeably different from one another.
Homogeneous – the parts (substances) are evenly distributed. It is difficult to tell one substance from another.

4. Solutions, and Suspensions and Colloids
A solution is a mixture that looks like a single substance and has the same properties throughout.
Solute ~ The substance that dissolves in a solution.
Solvent ~ The substance into which the solute dissolves.

5. Solutions, and Suspensions and Colloids
A colloid is a mixture that contains both small particles in solution and larger particles in suspension.
Colloids do not separate into layers.
Colloids, like suspensions scatter light.
Milk is an example of a colloid.
In a suspension components are dispersed, but large enough to see and settle out.