All specimens of matter can be classified as either pure or as
mixtures. Most matter is
considered as mixtures which are characterized by variable composition
and can be separated by physical means.
For example, blood is a mixture because its composition consists
of cells, plasma which can be separated.
The term homogeneous is used to describe portions of matter that
are uniform throughout. Homogeneous mixtures are known as solutions.
Mixtures that are not homogeneous are said to be heterogeneous.
When salt and water are mixed they form a homogenous solution. When oil and water are mixed the resultant mixture is
often need to separate mixtures into their component substances.
A large number of separation procedures have been developed but
we will concentrated on filtration, distillation, and chromatography.
The last lab will have the students make a bubble solution.