1. 8.25 Chemistry 5 Evidences of a chemical reaction, chemical formula

2. 8.25 WARM UP What is the saying to remember the 5 evidences of a chemical reaction?

3. 5 Evidences Osos Can Produce Grande Turds Odor given off Color change Precipitate Gas produced Temperature change

4. Announcements Quiz #4 – Tues Review sheet on blog & emailed Hypothesis Forms due Weds Late Science Fair Journal checks – not during class (success, before or after…) Final Project Approval – FRI 9/3 & 9/4 Mandatory Meeting for IRB

5. LEARNING GOAL: Structures of Matter 4 - I can describe the different types of properties & changes & give evidence as to why 3 - I can identify pp, cp, pc, cc 2 - I know most properties & changes 1 - I know several properties & changes

6. Prezi Prezi Notes go to blog 27 Examples of Awesome Chemical Reactions: http://www.buzzfeed.com/awesomer/coolest- chemical-reactions http://www.buzzfeed.com/awesomer/coolest- chemical-reactions

7. 8.25 Chemical Reactions & Chemical Formula Notes

9. Fun songs that review http://www.youtube.com/watch?v=MXmI67Co0mI http://www.youtube.com/watch?v=dxlWtsFinTM

10. Chemical Equation Reactant + reactant  product + product

12. Salt Na + Cl  NaCl In Notebooks: Na + Cl  NaCl Circle the reactants Box the products

13. Photosynthesis 6 (CO 2 ) + 6(H 2 O)  C 6 H 12 O 6 + 6 (O 2 )

14. The Law of Conservation of Mass States that matter can neither be created nor destroyed Total mass of reactants = total mass of products  Same amount of atoms need to be on the reactant side as the product side

15. Example baking soda + vinegar  sodium acetate + water + carbon dioxide 1.5 g + 20.0 g  21.5 g ______ = ______ NaHCO 3 + CH 3 COOH => CH 3 COO - Na + + H 2 O + CO 2 21.5g = 21.5 g

16. Conservation of Mass 2 H 2 O 2 → 2 H 2 O+ O 2  110g + 10g + 3g 123g

17. Example 1 - Water H 2 + O 2  H 2 O 1.How many atoms are on the reactant side? ___ H + ___ O 2. How many atoms are on the product side? ___ H + ___ O 3. Are there the same amount of H atoms on both sides? 4. Are there the same amount of O atoms on both sides?

18. Balance the equation… H 2 + O 2  H 2 O Mass of reactants = mass of products? 2 (H 2 ) + (O 2 )=2 (H 2 O)

19. Now it’s your turn, answer the rest __ H + __ O 2  __ H 2 O __ CH 4 + __ O 2  __ CO 2 + __ H 2 O __ Zn + __ HCl  __ ZnCl 2 + __ H 2 __ Ca + __ H 2 O  __ Ca(OH) 2 + __H 2 __C 5 H 12 + __ O 2  __ CO 2 + __H 2 0 CaCO 3  CaO + _____

20. http://www.flickr.com/photos/tpapi/3275375488/lightbox/ http://thekrazycouponlady.com/wp- content/uploads/2011/04/heintz-vinegar.jpg http://thekrazycouponlady.com/wp- content/uploads/2011/04/heintz-vinegar.jpg http://www.flickr.com/photos/katerha/5703151566/lightbox/ http://www.google.com/imgres?q=oxygen+molecule&um=1&hl=en &safe=active&client=safari&sa=N&rls=en&biw=1120&bih=594&tbm =isch&tbnid=axIiz7wO9xQDxM:&imgrefurl=http://www.globalwarmi ngart.com/wiki/File:Oxygen_Molecule_VdW_png&docid=O473puSV p8- OcM&w=400&h=296&ei=hHGKTpipFtKmsALX9aC4BA&zoom=1&iact =hc&vpx=255&vpy=282&dur=412&hovh=193&hovw=261&tx=150&t y=89&page=1&tbnh=118&tbnw=153&start=0&ndsp=18&ved=1t:42 9,r:7,s:0 http://www.chemistryforkids.net/sites/default/files/hydrogen- molecule_0.png