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Chemical Properties

Chemical Properties. BY: BRIANNA SHIELDS. DO NOW. 1. Which phase of matter has the most tightly packed particles? 2. Which type of phase change requires the addition of heat energy to change a liquid into a gas? 3. Which type of measurement utilizes a triple beam balance?. GOAL.

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Chemical Properties

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  1. Chemical Properties BY: BRIANNA SHIELDS

  2. DO NOW • 1. Which phase of matter has the most tightly packed particles? • 2. Which type of phase change requires the addition of heat energy to change a liquid into a gas? • 3. Which type of measurement utilizes a triple beam balance?

  3. GOAL • To distinguish between physical and chemical changes

  4. Chemical Changes A substance changes into a new and different substance The atoms are altered Often involves chemical rx

  5. Any type of burning

  6. Rusting Metal = iron + oxygen

  7. Verdigris: copper + sulfur

  8. Explosions: Fireworks

  9. Chemical Processes: Leaves changing color

  10. Plant photosynthesis

  11. Cheese production

  12. Odor Change: Soured milk

  13. Eggs rotting

  14. Baking a cake

  15. Mixing liquids: colors change

  16. Foaming (gas formation) Ex: antacid in water

  17. Corrosion due to acids (bubbling or fizzing)

  18. ACIDS Corrosive Sour taste pH paper 1-6 (reddish) Turns litmus red Phenopthalein in acid (no color change) Vinegar & lemon juice BASES Corrosive, slippery Bitter taste pH paper 8-14 (bluish) Turns litmus blue Phenopthalein in base turns pink Soaps, cleaning products 2 chemical indicators

  19. Acids & Bases • Watch the demonstrations at the front counter- are the substances acids or bases? How do you know?

  20. Physical or Chemical Change? • Painting a statue • Chopping wood • Crushing sugar crystals • Dissolving salt • Boiling water • Exploding firecrackers • Mixing baking soda & vinegar

  21. Physical or Chemical Change? • Rotting eggs • Crumpling wax paper • Slicing cucumber • Fizzing antacid in water • Lighting a match • Zipping a coat up • Rusting bike chains

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