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Topics : States of Matter Pure Substances Mixtures Physical and Chemical Changes

Matter. Topics : States of Matter Pure Substances Mixtures Physical and Chemical Changes Law of Conservation of Mass. Everything that has mass and volume is called matter. What is matter?. States of Matter. Uses of Plasma. Printing on plastic food containers

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Topics : States of Matter Pure Substances Mixtures Physical and Chemical Changes

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  1. Matter Topics: States of Matter Pure Substances Mixtures Physical and Chemical Changes Law of Conservation of Mass

  2. Everything that has mass and volume is called matter. What is matter?

  3. States of Matter

  4. Uses of Plasma • Printing on plastic food containers • Energy-efficient window coatings • High-efficiency window coatings • Safe drinking water • Voice and data communications components • Anti-scratch and anti-glare coatings on eyeglasses and other optics • Computer chips and integrated circuits • Computer hard drives • Electronics • Machine tools • Medical implants and prosthetics • Audio and video tapes • Aircraft and automobile engine parts

  5. Classification of Matter

  6. Characteristics of Pure Substances • Fixed composition • Cannot be separated into simpler substances by physical changes • Only changed chemically • Properties don’t change.

  7. 2 Types of Pure Substances – All use symbols! • Elements • Cannot be broken down by chemical means • Ex. Gold, Sodium, Copper, Oxygen • Single symbols, atoms • Au, Na, Cu, O • Compounds • 2 or more elements chemically combined • Formula, Molecule • Ex. Water, Carbon Dioxide, Oxygen gas • H2O, CO2, O2

  8. What is a Mixture? • 2 or more substances NOT chemically bonded. • No formulas or symbols • Variable composition • Parts keep individual properties • Separated into pure substances by physical methods

  9. HomogeneousVS Heterogeneous • Look the same throughout • Examples • Solutions • Solute & Solvent • Don’t look the same throughout or have different size particles • Examples • Suspension • Colloid (liq/solid) • Emulsion (liq/liq)

  10. Physical Properties – observed & measured w/o changing substance • Density • Size • Boiling Pt. • Shape • Mass • Texture • Melting Pt. • Strength • Hardness • Magnetism • Color • Volume

  11. What do physical properties determine? • Determine uses for item. • Aluminum for foil • Isopropyl alcohol for cooling • Graphite for writing

  12. Methods to separate mixtures • Filtering • Distillation • Magnets • Evaporation • Chromatography

  13. Chemical Properties • Describes how substance changes into a new substance, • Reactions • Energy and mass rearrange • Ex. – burning, rusting, acid/base reactions

  14. Chemical Changes • Used to change pure substances • 5 signs of chemical change • Temp change • Light • Color change • Bubbles • Smell • Make new substances

  15. Law of Conservation of Mass Matter cannot be created nor destroyed. It is just converted from one form to another.

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