Physical Science Chapter 5, Section 3

Notes from 10/28/10

Section 3 MixturesChapter 5

Properties of Mixtures

• A mixture is a combination of two or more substances that are not chemically combined.

• Each substance in a mixture keeps its identity because no chemical change happens when a mixture is made.

Section 3 MixturesChapter 5

Properties of Mixtures,

• Mixtures can be separated by physical means, such as filtration, evaporation, and distillation.

• The components of a mixture do not need to be mixed in a definite ratio.

Elements, Compounds, and MixturesChapter 5

Section 3 MixturesChapter 5

Solutions• A solution appears to be a single substance,

but it is actually a homogeneous mixture composed of particles of two or more substances that are distributed evenly among each other.

• In solutions, the solute is the substance that is dissolved. The solvent is the substance in which the solute is dissolved.

Section 3 MixturesChapter 5

Solutions, continued

• A substance that is insoluble, or unable to dissolve, forms a mixture that is not a solution.

• Solutions may be liquids, gases, or solids.

• Alloys are solid solutions in which metals or nonmetals are dissolved in other metals.