1. Chapter Nine Chemical Reactions

2. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 2 Jeff Hunter/Getty Images Chemical Reactions  CO 9.1

3. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 3 ←Fig. 9.1 When a hot nail is stuck into a pile of zinc and sulfur, a fiery combination reaction occurs and zinc sulfide forms. Chemical Reactions cont’d

4. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 4 →Fig. 9.2 A double-replacement reaction involving solutions of potassium and lead nitrate produces yellow, insoluble lead iodide as one of the products. Chemical Reactions cont’d James Scherer/Houghton Mifflin Company

5. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 5 →CC 9.1 Combustion reaction and global warming Chemical Reactions cont’d

6. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 6 Chemical Reactions cont’d →Aluminum reacting with iodine (purple smoke) →Formation of copper and zinc sulfate ←Mercury oxide decomposing (orange solid) ←Formation of silver chloride and sodium nitrate

7. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 7 →Fig. 9.3 The burning of calcium metal in chlorine is a redox reaction. Chemical Reactions cont’d James Scherer/Houghton Mifflin Company

8. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 8 Fig. 9.4 An increase in oxidation number is associated with the process of oxidation, a decrease with the process of reduction. Chemical Reactions cont’d

9. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 9 Table 9.1 Chemical Reactions cont’d

10. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 10 ←CC 9.2 Chemical Reactions cont’d

11. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 11 →Fig. 9.5 Rubbing a match head against a rough surface provides the activation energy needed for the match to ignite. Chemical Reactions cont’d

12. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 12 Fig. 9.6 The most favorable collision orientation is one that puts an O atom from NO 2 in close proximity to the C atom of CO. Chemical Reactions cont’d

13. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 13 →Fig. 9.7 Energy graphs showing the difference between an exothermic and an endothermic reaction. Chemical Reactions cont’d

14. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 14 Figs. 9.8a-d A fire (a) is a much faster reaction than the ripening of fruit (b), which is much faster than the process of rusting (c), which is much faster than the process of aging (d). Chemical Reactions cont’d Vince Streano/Getty Images Myrleen Ferguson Cate/PhotoEdit Sam Fried/Photo Researchers © Cecile Brunswick/ Peter Arnold, Inc.

15. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 15 →Fig. 9.9 Catalysts lowers the activation energy for chemical reactions. Chemical Reactions cont’d

16. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 16 Chemical Reactions cont’d CC 9.3

17. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 17 Fig. 9.10 Graphs showing how reaction rates and reactant concentration vary with time. Chemical Reactions cont’d

18. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 18 Chemical Reactions cont’d Tom McHugh/Photo Researchers ←CC 9.3 Los Angeles Smog

19. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 19 Table 9.2 Chemical Reactions cont’d

20. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 20 →Fig. 9.11 Henri Louis Chatelier was amazingly diverse in his interests. Chemical Reactions cont’d Edgar Fahs Smith Collection, University of Pennsylvania

21. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 21 ←Fig. 9.12 Concentration changes that result when H 2 is added to an equilibrium mixture. Chemical Reactions cont’d

22. Copyright © Houghton Mifflin Company. All rights reserved.Chapter Nine | Slide 22 →Fig. 9.13 Equilibrium mixtures changing color with difference in temperatures. Chemical Reactions cont’d