Chapter 13 Study Guide

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Chapter 13 Study Guide
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• 1. What law says that you have to have a
  balanced chemical equation? Law of conservation
  of mass
• 2. In what type of reaction do ions in two
  compounds switch places?
• Double displacement

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• 3. What is the role of an enzyme?
• Act as a catalyst/ speed up reactions in the body
• 4. What type of reaction is this?
• Fe 2HCl ? FeCl2 H2
• Single displacement

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• 5. Is milk turning sour a chemical reaction? Yes
  change in smell and composition
• 6. How many oxygen atoms are in the formula
  CaCO3? 3

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• 7. How do you make a reaction go faster if you
  have a solid? Crush it into a powder or add a
  catalyst
• 8. What does a catalyst do? Increases the rate of
  a reaction

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• 9. What are the clues that a chemical reaction is
  taking place?
• Color change, gas formation, light (CHANGE IN
  COMPOSITION)
• 10. Do the new substances created in a chemical
  equation have new physical and chemical
  properties, or just physical?
• BOTH new substance with brand new properties

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• 11. Is a pencil breaking a chemical reaction? No
  its still a pencil
• 12. What must atoms do in a chemical reaction?
  Break apart, rearrange, and form new bonds

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• 13. What is a shorthand method of identifying an
  element? Chemical symbol
• 14. What is a shorthand notation for a compound
  that uses symbols and numbers? Chemical formula

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• 15. What is the formula for carbon dioxide? CO2
• 16. Prefix for 1mono 2di 3tri 4tetra
• 5 penta

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• 17. -Ide is used in naming what two types of
  compounds? Ionic and covalent
• 18. What kind of bond forms between a metal and a
  nonmetal? Ionic

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• 19. Where are the reactants in a chemical
  equation? Left of the arrow (what you start with)
• 20. What are the starting materials in a chemical
  reaction called? reactants

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• 21. What are the substances formed in a chemical
  reaction called? products
• 22. What separates reactants from products in a
  chemical equation? Arrow/yields sign

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• Balance the equation H2 O2 ? H20
• 2H2 O2 ? 2H2O
• What does the law of conservation of mass say
  that a chemical equation must show? Both sides
  balanced/equal

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• 25. A reaction where two or more substances
  combine to form a new substance is called a
  synthesis reaction.
• 26. A reaction where a single compound breaks
  down into two or more simpler substances is
  called a decomposition reaction.

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• 27. A reaction where an element takes the place
  of another element is called a single-displacement
  reaction.
• 28. How many oxygen atoms are in Al2(SO4) 3? 12

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• 29. What type of reaction is 2Na Cl2 ? 2NaCl
• synthesis
• 30. What type of reaction is H2CO3 ? H20 CO2
• decomposition

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• 31. What type of reaction is Zn HCl ? ZnCl2
  H2
• single displacement
• 32. What type of reaction is NaCl AgF ? NaF
  AgCl
• Double displacement

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• 33. In what type of reaction is energy released?
  exothermic
• 34. In what type of reaction is energy absorbed?
  endothermic

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• 35. What are 2 examples of exothermic reactions?
  Fire, glow stick
• 36. At what temperature would a glow stick shine
  brightest, 0? or 40?? 40 degrees Celsius

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• 37. What happens to the reaction rate if
  particles collide more often? Increases
• 38. Which would react fastest with vinegar, a
  baking soda cube or powder? powder

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• 39. On the exothermic energy graph, where is the
  activation energy?
• right
• 40. On the endothermic energy graph, where is the
  activation energy?
• left

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• 41. What does an exothermic reaction look like?
  Chart on pg. 351 (notes)
• 42. What does an endothermic reaction look like?
  Chart on pg. 351 (notes)

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• 43. Where is the energy absorbed on an
  endothermic chart?
• left
• 44. Where is the energy released on an exothermic
  chart?
• right

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• 45. What type of reaction occurs when wood burns?
  
• exothermic
• 46. A substance that slows down a chemical
  reaction is called a(n) inhibitor.

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• 47. What does the law of conservation of mass say
  about the reactants and products? They must be
• 48. What is the minimum amount of energy needed
  to react called?
• Activation energy

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• 49. What is an example of a catalyst? enzymes
• 50. How many nitrogen atoms are in Ca(NO3)2?
• 2