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What is Matter

What is Matter. Unit 1: Part 1. How is Matter Classified? . Pure Substances Elements Found on the PT O 2 , N 2 , F 2 , Br 2 , I 2 , Cl 2 , and H 2 Compounds Made of 2 or more different elements chemically bound together CO 2 , H 2 O, C 6 H 12 O 6. Mixtures Homogeneous

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What is Matter

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  1. What is Matter Unit 1: Part 1

  2. How is Matter Classified? Pure Substances • Elements • Found on the PT • O2, N2, F2, Br2, I2, Cl2, and H2 • Compounds • Made of 2 or more different elements chemically bound together • CO2, H2O, C6H12O6 Mixtures • Homogeneous • Mixtures that are uniform throughout • Also known as solutions (solute=being dissolved; solvent=doing the dissolving) • Milk, salt water • Heterogeneous • Mixtures that are not uniform throughout • Muddy water, iced tea

  3. Can you classify the following? • Kool-aid • Pure water • Rubbing alcohol • Butter pecan ice cream • Hydrogen gas • Brass • Chex mix • Orange juice with pulp • Sugar • Iron

  4. Properties of matter • Physical Properties • Property that can be observed without changing the identity of the substance • Examples • Color • Luster • Smell • Melting point • Boiling point • Chemical Properties • Property that can only be observed if the identity of the substance is changed • Examples • Flammability • Combustibility • Ability to rust • Ability to react with an acid • ***react***

  5. Changes that Matter Undergoes • Physical Changes • A change that occurs that does not alter the identity of the substance • Examples • Melting • Boiling • Evaporating • Condensing • Tearing • Splitting • Chemical Changes • A change that occurs that alters the identity of the substance • Examples • Rusting • Burning • Combusting • Reacting to form a gas • Reacting with an acid • Known as a chemical reaction

  6. Indicators of Chemical Changes • Production of a gas • Production of light • Production of heat • Color change • Formation of a precipitate • Precipitate: a product formed during a chemical reaction that is insoluble in the solvent present (usually water)

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