Agenda 3/19: HW: Create Q and A for Chapter test. Chapter test on Wednesday 3/25. Robotics Club today at 3:30 pm. Warm-up: WRITE AND BALANCE THE EQUATION Table of Contents for Interactive Notebook Unit: 4 Chapter Left side items Page Right side items page Balancing Equations HW62Balancing Act63 Acids & Bases Venn diagram 64Acids and Bases Cornell notes 65 Create Q and A for Chapter test 66Review for Chapter P + O 2  P 4 O 10 reactants product Complete your cornell notes on acids and bases.

Create Q and A for chapter Create at least 5 questions and answers to what you think will be on the test. Compounds Chemical reactions Crystals and polymers Acids and Bases 66 WARM-UP: WRITE AND BALANCE THE EQUATION 1. P + O 2  P 4 O 10 reactants product

Chapter Test Review Study Guide Class Set. Do not write on this. Write all of your answers in your notebook. 67

1. What is the name of the indicated atom in the acetic acid molecule shown below? CH 3 C OH O 2. Copper (Cu) reacts with oxygen (O) to form copper oxide (CuO). Explain whether CuO will have similar properties to Cu, O, to both, or to neither.

3. The following equations represent chemical reactions. Which equation shows that the total mass during a chemical reaction stays the same? A 1B 2C 3D 4 12Na + 2H 2 O 2 H 2 + O NaOH + H 2 H20H20 Mg + Cl 2 MgCl 2 NAOH +MgCl 2 NaCl + MgOH

4. Which chemical equation indicates a chemical reaction. How do you know? (A) Na + Cl NaCl Fe (L) Fe (S) OR (B)

5. This picture is a cross section of a _____? Apolymer Bcrystal Cplastic Dprotein

6. Describe the pattern and structure of crystals. 7. What element is best able to combine with itself and Hydrogen (H) to form large molecules? 8. What characteristic of carbon (C) makes it essential to living organisms? REPEATING PATTERN OF POSITIVE AND NEGATIVE IONS CARBON It can bond 4 different ways thus creating variety in compounds

9. Which of the following compounds is most likely to be part of living organisms? A C 6 H 12 O 6 B BF 3 C MoCl 2 D CsI

11. What are the reactants? 2Mg + O 2 2MgO 10. Balance the equation 2H 2 + O 2  2 H 2 O

12. Using the chart, what would be the mass of CO 2 after the chemical reaction? NaHCO 3 + CaCl 2  CaCO 3 + H CO 2 Mass of items used in experimentMass after chemical reaction took place Baking soda (NaHCO 3 ) 50 gramsCaCO grams Triple Beam balance 3500 gramsH grams Plastic bag 5 gramsCO 2 ? CaCl grams A.3705 grams B.205 grams C. 200 grams D. 80 grams

14. 2Al 2 O 3  4Al + 3O 2 20g What is the mass of 3O 2 ? ? 15g You are observing a reaction occurring in a beaker. Which would be the best method for determining whether the reaction is exothermic or endothermic? If you touch the outside of the beaker and it is hot, it is exothermic. 5 grams

15. After Mike added some vinegar to a test powder in a beaker, the mixture started to fizzle and changed color. Considering this result, which statement most likely applies? A A chemical change did not occur. B A chemical change produced new substances. C A physical change produced new substances D A physical change usually gives off heat.

16. When potassium metal is placed in water, it bursts into flames. This reaction is identified as A endothermic B exothermic C neutralizing D reactants 17. How many bonds in CO 2 ? C O O 4 bonds

18. A student burns 5 grams of oil. She finds that the mass of the product is 1 gram. She concluded that that the total mass of the product decreased in the chemical reaction. Which is the problem with her conclusion? 19. Which is an organic compound? A CH 4 B HCl C NaCl D O 2 Some of the reactants turned to a gas and escaped so she could not measure it.

20. The equation shows which type of process? H 2 O(L) H 2 O(S) AChemical BPhysical CBoth Physical and Chemical DNone of these 21. How many atoms of each element make up 4MgCl 2 ? 4 Mg 8 Cl

22. Which element is not usually found in molecules that make up living organisms? A C B N C O D Pb 23. Which is not an example of a large molecule made from many smaller parts? A sugar B DNA C enzyme D starch

24. How many atoms of each element are in 3N 3 O 25. Which is a carbon-based molecule? Aoxygen Bsalt Csugar Dwater 9 N 3 O

26. Is a liquid with a pH of 6 acidic, basic, or neutral? How do you know? 27. You cut a grapefruit in half and touch a piece of blue litmus paper to the inside of the fruit. What happens to the litmus paper? 28. Which of these is acidic? A. Tums B. shampoo C. orange juice D. saltwater ACID, less than 7 It turns red

29. What two products form when an acid and base mix? 30. How can you neutralize an acid? 31. In a balanced chemical equation, which is true about the number of atoms of each element in the products and in the reactants? 32. What should be balanced in a chemical equation? ACIDS AND BASES ADD A BASE THE NUMBER OF ATOMS NEEDS TO BE THE SAME ON BOTH SIDES OF THE EQUATION. THE ATOMS

33. Several grams of table salt are dissolved in a beaker of water. How would this change be classified? A. Chemical reaction; heat is usually required to make salt dissolve. B. Chemical reaction; the salt changed form as it dissolved. C. Physical change; no heat was released during the change D. Physical change; the salt and water did not form new substances.

34. What is the best explanation for the following equation? HCl + NaOH  NaCl + H 2 O A. The mass before the reaction and the mass after the reaction are not equal. B. The mass before the reaction and the mass after the reaction are equal. C. The properties of the products are the same as the properties of the reactants. D. None of these.

35. Find the mass of the reactants, products and determine if it meets the law of conservation of mass. A. Reactants 5 grams, Products 5 grams, Yes B. Reactants 3 grams, Products 2 grams, No C. Reactants 7 grams, Products 7 grams, Yes D. Reactants 7 grams, Products 7 grams, No