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Science: Today we took a test over chapter 13.  Homework is to include chapter 14 vocabulary in your composition book.

Physical Science:  Today in class we took a test over chapter 21.  Homework is to include chapter 22 vocabulary in your composition book.

Science:  Today in class we discussed energy in chemical reactions and factors that affect chemical reaction rate. Don’t forget test is on Monday November 30th.  Also workbook pages for chapter 13 are due.  Extra credit is due on December 11th.

Physical Science:  Today in class we worked on chapter 21 chapter review page 656 #1-20 and page 657 #29-30 plus the math problems on 843 #223-232.  Test on Monday over chapter 21.

Science:  Today we took a quiz over balancing chemical equations. Homework due Monday is chapter 13 workbook pages.

Physical Science:  Today we discussed chapter 21 section 4.

Physical Science Study Guide

Chapter 21: Chemical Reactions

1. What is a chemical reaction?
2. What are the different parts of a chemical reaction?
3. What is the Law of Conservation of Mass?
4. Who is the person that came up with the Law of Conservation of Mass?
5. How did he figure out the Law of Conservation of Mass?
6. What are the symbols used in chemical reactions?
7. What is a coefficient?
8. How do you balance a chemical equation?
9. What does it mean to balance a chemical equation?
10. Balance the following chemical equations:

Fe + H₂O –> Fe₃O₄ + H₂

HgO –> Hg + O₂

Pb(NO₃)₂ + K₂CrO₄ –> PbCrO₄ + KNO₃

Fe + CuCl₂ –> FeCl₂ + Cu

H₂ + N₂ –> NH₃

Na + Br₂ –> NaBr

11. What is a combustion reaction?
12. What is a synthesis reaction?
13. What is a decomposition reaction?
14. What is a single-replacement reaction?
15. What is a double-replacement reaction?
16. What is an oxidation-reduction reaction?
17. Identify the reaction types in question 10.
18. What is an exergonic reaction? Give an example.
19. What is an exothermic reaction? Give an example.
20. What is an endergonic reaction? Give an example.
21. What is an endothermic reaction? Give an example.
22. What does a catalyst do?
23. What does an inhibitor do?
24. What are some factors that affect the rate of a chemical reaction?

Study Guide Chapter 13 Chemical Reactions

1. What is a chemical reaction?
2. What are some signs that a chemical reaction has occurred?
3. What is a precipitate?
4. When a chemical reaction occurs what happens to the chemical bonds in the reactants versus the products?
5. What is a chemical formula?
6. How do you write chemical formula for ionic compounds?
7. How do you write chemical formula for covalent compounds?
8. What are the different parts of a chemical equation?
9. Which side is the reactants?
10. Which side is the products?
11. What is the law of conservation of mass?
12. How do you balance a chemical equation?
13. What is a coefficient?
14. Balance the following equations:

Fe + H₂O –> Fe₃O₄ + H₂

HgO –> Hg + O₂

Pb(NO₃)₂ + K₂CrO₄ –> PbCrO₄ + KNO₃

Fe + CuCl₂ –> FeCl₂ + Cu

H₂ + N₂ –> NH₃

Na + Br₂ –> NaBr

15. What are the four types of chemical reactions?
16. Identify the reactions in question 15.
17. What is an exothermic reaction?
18. What is an endothermic reaction?
19. What is the law of conservation of energy?
20. What is activation energy?
21. How do you get activation energy?
22. What does the energy diagram look like for an exothermic reaction?
23. What does the energy diagram look like for an endothermic reaction?
24. What are factors that affect the rate of a chemical reaction?
25. How does temperature affect the rate of a chemical reaction?
26. How does concentration and surface area affect the rate of a chemical reaction?
27. What is an inhibitor? Give an example.
28. What does an inhibitor do to the rate?
29. What is a catalyst? Give an example.
30. What does a catalyst do to the rate?

Science:  Today in class we went over chapter 13 section 3 over types of reactions.

Physical Science:  Today we took a quiz over balancing chemical equations.

Science:  Today we discussed balancing chemical equations.  We took a quiz over balancing chemical formula.

Physical Science:  Today we discussed balancing chemical equations.

Science:  Today we balanced chemical equations.  Homework was a worksheet.  Test has been moved to Monday November 30th.

Physical Science:  Today we balanced chemical equations and we identified types of chemical reactions.  Test has been moved to Monday November 30th.

Science:  Today in class we took a quiz over chemical formula and compound names.  We also discussed balancing chemical equations.

Physical Science:  Today in class we completed a worksheet over balancing chemical equations.  Homework is to read chapter 21 section 3.  Don’t forget about the test on Friday.

Science:  Today in class we went over the two worksheets over writing chemical formula and naming compounds.  No Homework.  Test is on Monday.

Physical Science:  Today in class we balanced some chemical equations.  No Homework.  Test is on Friday.