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C. Johannesson Ch. 1 - Matter II. Classification of Matter (p.15-17, 397-398)  Matter Flowchart  Pure Substances  Mixtures.

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Presentation on theme: "C. Johannesson Ch. 1 - Matter II. Classification of Matter (p.15-17, 397-398)  Matter Flowchart  Pure Substances  Mixtures."— Presentation transcript:

1 C. Johannesson Ch. 1 - Matter II. Classification of Matter (p.15-17, )  Matter Flowchart  Pure Substances  Mixtures

2 C. Johannesson A. Matter Flowchart MATTER Can it be physically separated? Homogeneous Mixture (solution) Heterogeneous MixtureCompoundElement MIXTUREPURE SUBSTANCE yesno Can it be chemically decomposed? noyes Is the composition uniform? noyes ColloidsSuspensions

3 C. Johannesson A. Matter Flowchart  Examples:  graphite  pepper  sugar (sucrose)  paint  soda element hetero. mixture compound hetero. mixture solution

4 C. Johannesson B. Pure Substances  Element  composed of identical atoms  EX: copper wire, aluminum foil

5 C. Johannesson B. Pure Substances  Compound  composed of 2 or more elements in a fixed ratio  properties differ from those of individual elements  EX: table salt (NaCl)

6 C. Johannesson B. Pure Substances  Law of Definite Composition  A given compound always contains the same, fixed ratio of elements.  Law of Multiple Proportions  Elements can combine in different ratios to form different compounds.

7 C. Johannesson B. Pure Substances  For example… Two different compounds, each has a definite composition.

8 C. Johannesson C. Mixtures  Variable combination of 2 or more pure substances. HeterogeneousHomogeneous

9 C. Johannesson C. Mixtures  Solution  homogeneous  very small particles  no Tyndall effect Tyndall Effect  particles don’t settle  EX: rubbing alcohol

10 C. Johannesson C. Mixtures  Colloid  heterogeneous  medium-sized particles  Tyndall effect  particles don’t settle  EX: milk

11 C. Johannesson C. Mixtures  Suspension  heterogeneous  large particles  Tyndall effect  particles settle  EX:fresh-squeezed lemonade

12 C. Johannesson C. Mixtures  Examples:  mayonnaise  muddy water  fog  saltwater  Italian salad dressing colloid suspension colloid solution suspension


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