Mixtures of Matter

Classification of Matter

Substance Matter that has a uniform and unchanging composition

Mixture Combination of 2 or more pure substances They are physically mixed but, don’t react

Heterogeneous Does not blend smoothly and individual substances remain distinct Sand and water; orange juice; pizza

Homogeneous Mixture Constant composition throughout Homogenous Mixture - Is a single phase AKA - Solution Salt water

Two types of pure substances: Elements Compounds

Element: A pure substance that cannot be separated into simpler substances by chemical or physical means Found on periodic table 91 naturally occurring, the rest man made

Compound: Combination of two or more elements 1 Million compounds and 100,000 more found every year. Water; hydrogen peroxide

Has mass and volume (s, l, g) More than one type of matter Uniform throughout (solutions) Not uniform throughout One type of matter One type of atom Two or more elements

Separating Mixtures Reverse of Mixing Helps to understand matter Use physical processes used to separate solutions

Filtration -Technique that uses a porous barrier to separate a solid from a liquid. -Separate heterogeneous mixtures composed of solids and liquids.

Distillation -Separation technique based on differences on boiling points. -Separates a liquid from a liquid.

Crystallization formation of pure solid particles from a solution

Chromatography Separates on tendency of chemical to travel.

Separation of Pure Substances Requires chemical means