3. Wednesday, Sept. 18 th : “A” Day Thursday, Sept. 19 th : “B” Day Agenda  Finish chapter 8 review/Collect  Short Answer Test Questions  Review for chapter 8 test  Concept Review work time  Homework: 1. Crossword puzzle 2. Concept Review Next Time: Crossword Puzzle and Concept Review Due Chapter 8 test

4. Chapter 8 Review  Finish Chapter 8 review, pg. 292-294: #1, 4, 8, 10, 13-15, 17-18, 20, 27-28, 30, 35, 37-38  Due today

5. Short Answer Test Questions  These are questions that will be on the test… 1.When a glass blower shapes molten glass into an ornament, does a chemical reaction occur? Explain. 2.Photosynthesis is the process were plants use sunlight to make glucose and oxygen gas from carbon dioxide and water. Write a word equation for the reaction. 3.When balancing a chemical equation, explain why formula subscripts should never be changed.

6. Short Answer Test Questions, cont. 4.Explain what is wrong with the following chemical equation. Then, write the correct chemical equation. Li + O 2 LiO 2 5. In the “Classifying Chemical Reactions” lab, explain how you could tell the difference between the CO 2 and H 2 gases that were generated in certain reactions.

7. Ch 8: Chemical Equations and Reactions Review

8. 1.What do you need for proof of a chemical reaction? Chemical or laboratory analysis Chemical Equations and Reactions

9. 2. If the products of a chemical reaction have the same chemical properties as the reactants, has a chemical reaction really occurred? Absolutely NOT! Chemical Equations and Reactions

10. 3.Is energy absorbed or released in the following reaction: CH 4 + 2 O 2 CO 2 + 2 H 2 O + energy Released 4.Is this an exothermic or endothermic reaction? Exothermic

11. Chemical Equations and Reacti ons 5.What is a precipitate? An insoluble solid formed from a chemical reaction in solution. 6.How would this solid be represented in a chemical equation? (s)

12. Chemical Equations and Reaction s 7.Why is oxygen written as O 2 in chemical equations? Oxygen is a diatomic element and exists as O 2. 8.What are some other diatomic elements? H 2, N 2, Cl 2, Br 2, I 2, F 2

13. Chemical Equations and Reactions 9.To balance a chemical equation, what may you need to adjust? Coefficients 10.How do you know when a chemical equation is balanced? When the number of atoms of each element is the same on the reactant side and the product side of the equation.

14. Chemical Equations and Reactions 11. Write an UNbalanced equation for the reaction between ore hematite, Fe 2 O 3, with carbon to produce iron and carbon dioxide. Fe 2 O 3 + C Fe + CO 2 12. Now, balance it 2 Fe 2 O 3 + 3 C 4 Fe + 3 CO 2

15. Chemical Equations and Reactions 13. What coefficients would correctly balance this equation: CaO + H 2 O Ca(OH) 2 1, 1, 1 (It is already balanced) 14. Which type of reaction is this? Synthesis

16. Chemical Equations and Reactions 15.When carbon dioxide and water are produced by the reaction of a carbon based compound with oxygen, what is that type of reaction called? Combustion 16. When 2 or more substances combine to form a new compound, what is that type of reaction called? Synthesis

17. Chemical Equations and Reactions 17. Which type of reaction only has 1 reactant? Decomposition 18. When 1 element replaces a similar element in a compound, what type of reaction is that? Single Displacement

18. Chemical Equations and Reactions 19. The list of elements that is arranged according to the ease with which they undergo certain chemical reactions is called what? Activity Series 20.Why is the activity series useful? It can help predict whether a certain chemical reaction will occur or not.

19. Chemical Equations and Reactions 21. What is the reaction type when ions of two compounds appear to exchange places in aqueous solution to form new compounds? Double Displacement 22.Will a reaction take place if Cu is added to a solution of NaNO 3 ? Explain. No. Sodium is MORE active than copper so the Na will NOT be displaced.

20. Chemical Equations and Reactions 23. Solid iron (III) oxide is produced by the reaction of iron and oxygen. Write a balanced chemical equation, including states of matter, and identify the type of reaction. 4 Fe (s) + 3 O 2 (g) 2 Fe 2 O 3 (s) Synthesis

21. Chemical Equations and Reactions 24. Write a balanced chemical reaction, including states of matter, and identify the type of reaction when aluminum and chlorine are produced from solid aluminum chloride. 2 AlCl 3 (s) 2 Al (s) + 3 Cl 2 (g) Decomposition

22. Chemical Equations and Reactions 25. Write a balanced chemical reaction, including states of matter, and identify the type of reaction when water vapor and carbon dioxide are produced from the reaction of liquid hexane, C 6 H 14 with oxygen. 2 C 6 H 14 (l) + 19 O 2 (g) 14 H 2 O (g) + 12 CO 2 (g) Combustion

23. Homework 1.Crossword Puzzle 2.Concept Review Next Time: Crossword Puzzle due Concept review due Chapter 8 test