Mixtures Lecture Chapter 2: Section 1

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.

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.

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.

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.