Mixtures
Heterogeneous mixture: has one or more visible
boundaries between the components.
Homogeneous mixture: has no visible boundaries
because the components are mixed as individual atoms,
ions, and/or molecules.
Solution: a homogeneous mixture is also called a solution.
Solutions in water are called aqueous solutions, and are
very important in chemistry and biochemistry. Although
we normally think of solutions as liquids, they can exist in
all three physical states.
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