1 / 26

Chemical Properties

Chemical Properties. BY: BRIANNA SHIELDS. DO NOW. On the last page of your note packet from last class: Label the arrows on the diagram with the words evaporation, melting, freezing and condensation Also, label where the solids, liquids and gases exist Work with your group members. GOAL.

kathy
Télécharger la présentation

Chemical Properties

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemical Properties BY: BRIANNA SHIELDS

  2. DO NOW • On the last page of your note packet from last class: Label the arrows on the diagram with the words evaporation, melting, freezing and condensation • Also, label where the solids, liquids and gases exist • Work with your group members

  3. GOAL • To distinguish between physical and chemical changes

  4. Chemical Changes Changing the substance into a new one by changing atoms

  5. Other Chemical Indicators 1. Burning 2. Foaming/Fizzing/ Bubbling

  6. Other Chemical Indicators 3. Odor change 4. Color change 5. Corroding Acids

  7. Other Chemical Indicators 6. Rusting metal (iron + oxygen = rust) 7. Explosions (fireworks) 8. Verdigris- greened statutes (copper + sulfur)

  8. Other Chemical Indicators 9. Cooking & some food production (cake baking, cheese production) 10. Chemical processes in nature (photosynthesis)

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

  10. Any type of burning

  11. Rusting Metal = iron + oxygen

  12. Verdigris: copper + sulfur

  13. Fireworks

  14. Leaves changing color

  15. Plant photosynthesis

  16. Cheese production

  17. Soured milk

  18. Eggs rotting

  19. Baking a cake

  20. Mixing liquids: colors change

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

  22. Corrosion due to acids (bubbling or fizzing)

  23. 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

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

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

  26. 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

More Related