Definitions - Pure Substances and Mixtures

These are the current definitions that you should be studying.  Updated Jan 26th.


This list is now complete.


Matter Anything that takes up space, has mass, and is made up of particles.
Pure Substance A material that is composed of only one type of particle; examples of a pure substance include gold, oxygen and water.
Mixture A material made up of at least two different pure substances.
Mechanical Mixture A mixture in which each material maintains its own properties.
Solution A mixture in which the distinct properties of the different substances are combined into one set of properties.
Homogeneous A material having only one set of properties.
Heterogeneous A mixture, made up of parts that retain their own properties, even if these properties are not visible to the unaided eye.
Solute A substance that can be dissolved in a solvent; for example, salt is a solute that dissolves in water.
Solvent A substance into which a solute may be dissolved; for example, water is a solvent that dissolves sugar.
Filtration The act of pouring a mixture through a mesh, in attempts to separate the components of the mixture.
Filtrate The part of a mixture that passes through a filter.
Residue The part of a mixture that remains on a filter.
Distillation A process for separating the parts of a liquid solution.  The solvent is heated and the gas is collected and cooled.
Soluble When a solute is able to dissolve in a solvent.
Insoluble When a substance is not able to dissolve in another, specific, substance.
Dissolve The act of a solute completely combining with a  solvent to become a solution.
Dilute To weaken the strength of a solution by increasing the amount of solvent.
Dilute Solution A solution that contains little solute.
Strengthen To increase the strength of a solution by increasing the amount of solute.
Concentrated Solution A solution that contains a lot of solute.
Saturated A solution in which no more solute can be dissolved at a given temperature.
Supersaturated A solution in which heat has been used to dissolve more solute than a solution could normally dissolve.