View Quick LAB

1. Warm Up:How does Pharmaceutical Chemist determined on the label, how often and when to take a pill?

2. Potassium Permangnate and Glycerin/Glycerol • Decomposition of Hydrogen Peroxide View Quick LAB

3. Rates of Reaction KEYWORD: rate STARTER : Put these in order from fastest to slowest Rotting FruitFireworkBaking a cakeCooking an eggrusting of nail

4. Q. What do you understand by the term ‘rate of reaction’? The rate of a reaction is ‘the time taken for a product to form, or reactants to be used up’ Rate = amount of product produced (reactants used up) / time taken What do we mean by ‘rate’?

5. 2 VOLUNTEERS PLEASE! Do we always get a reaction?

6. REVIEW Measuring the rate at which ____1___ are used up or ____2__ are made are two ways of measuring the ___3___ of a chemical reaction. An example of a reaction that happens quickly is a ____4_______ . A reaction that happens slowly is _____5_____ .

7. How could you measure the rate of these reactions? Use your definition to help you. Measuring Rate

8. REVIEW hydrochloricacid magnesiumchloride + + magnesium  hydrogen Q. How could you measure the rate of the reaction? Include the units you would use? • The amount of hydrochloric acid used up (cm3/min). • The amount of magnesium chloride produced (g/min). • The amount of hydrogen product (cm3/min).

9. Calculating rate of reaction from graphs rate of reaction = y x 45 cm3 = 2.25 cm3/s rate of reaction = 20 s 70 60 x 50 40 hydrogen produced (cm3) 30 y 20 10 0 0 10 20 30 40 50 time (seconds) The gradient of the graph is equal to the initial rate of reaction at that time

10. Graphs tell a story. Sketch these two graphs and write a sentence to explain what the graph shows you.

11. Rate = amount of product produce / times takes = 5 / 25 PP Question:

12. Please take out a new note sheets for this. Title it…… Collision Theory

13. All substances are made of atoms or molecules. Collision theory

14. All substances are made of atoms or molecules. For a reaction to take place the particles of different substances must collide. Collision theory

15. All substances are made of atoms or molecules. For a reaction to take place the particles of different substances must collide. Collision theory

16. All substances are made of atoms or molecules. For a reaction to take place the particles of different substances must collide. Collision theory

17. All substances are made of atoms or molecules. For a reaction to take place the partciles of different substances must collide. The more collisons between particles in a given time, the faster the reaction. Collision theory

18. Not all collisions result in a reaction. • For a collision to be successful, the molecules must have a minimum amount of energy called the ACTIVATION ENERGY • AND the particles must have the correct orientation Collision theory

19. POTENTIAL ENERGY DIAGRAM

20. Exothermic or Endothermic?

21. Endothermic or Exothermic?

22. Copy and Complete. What does A,B,C,D stands for?

23. Who Wants to be a Millionaire Check For Understanding

24. Please take out the learning target log. Write date and scale yourself Learning Target Log 7D & 7E

25. FACTORS AFFECTING RATE REACTIONS

26. As we increase the surface area, we increase the rate of reaction Why? Rate and Surface area

27. http://ca.pbslearningmedia.org/resource/lsps07.sci.phys.matter.expldust/dust-explosion/http://ca.pbslearningmedia.org/resource/lsps07.sci.phys.matter.expldust/dust-explosion/ Watch video

28. Why is sugar powder so much more combustible when it is dispersed? • Can you think of another substance that is not combustible until it is airborne in tiny droplets or particles? TPS

29. Many fine solids, like sugarpowder, are dangerous in their dust form. As a dust, the surface area of a material is high. • In addition, when dust is airborne, the particles are surrounded by oxygen. As a result, combustion can happen at a very rapid rate. • The rapid combustion can lead to an explosion if the resulting heat and gas cannot dissipate quickly enough. • Dust explosions are a serious hazard in many industries, and extreme care must be taken in factories to control dust and to prevent ignition. Dust from wheat, corn, wood, plastic, and even metals can produce dangerous combustion reactions. VIDEO FEEDBACK

30. The bigger the surface area, the more particles are exposed and so can react. Rate and surface area

31. CuSO4 • 5H2O = copper sulfate pentahydrate water vapor  + heat CuSO4 • 5H2O + energy  CuSO4 + 5H2O If you heat copper sulfate pentahydrate crystals, they will give off water molecules into the air and become anhydrous copper sulfate. However, if the crystals are large, lots of water molecules are trapped deep inside the crystals, so they can’t escape into the air as easily.

32. If you grind the pretty blue crystals up with a mortar & pestle, they will turn into a powder. Now, the copper sulfate is made of smaller particles, so it has more surface area. Now, it will be easier for H2O molecules to escape from the crystals and fly into the air as water vapor.

33. Rate and Concentration

34. As we increase the concentration, the rate of reaction increases. Rate and concentration

35. As we increase the concentration, the rate of reaction increases. Why? Rate and concentration

36. As we increase the concentration, there are more particles in the same volume so the greater chance of a collision. Rate and Concentration

37. Please take out the learning target log and rate yourself Learning Target Log

38. “Would You Supersize My Cancer Please? A Case Study Exploring Chemicals in the News” CASE STUDY

39. RECIPROCAL TEACHING: • Prediction • Please predict what you think the reading may be about. Think about what is going to happen by asking questions like a detective might do. • Question as you go • Please generate questions as they listen and read. Please note that there are three levels of questions: • Right-There questions (answer in the text) • Between-the-lines questions (inference needed) • Critical Thought questions (require your opinion) Case Study

40. Clarify • As you listen and read, remind to ask yourself what words and phrases that are unclear to you. These clarifications may take the form of the following questions. • How do you pronounce that? • What does the word mean? • I think the author is saying… • I'm guessing 'pie-in-the-sky' means… • Summarize • Please write down and summarize verbally by read it aloud to your small group.

41. Please respond to the questions at the end of the case study • Due in 3days HOMEWORK: Research Writing assignment

42. Animation of a case of an explosion • Why should we care about rate reaction? Watch Video

43. As we increase the temperature, we increase the rate of reaction. Rate and Temperature

44. The increased speed of the particles mean that collisions occur more often in a certain time, and it is more likely that a collision will result in the particles reacting. Rate and temperature

45. Rate and Temperature

46. Rate and Catalysts

47. A catalyst provides an alternative route with a lower activation energy barrier. • At the end of the reaction the catalyst is unchanged. • Inhibitor is a substance that interferes with the action of a catalyst. Examples? Rate and Catalysts

49. Please take out the learning target log and rate yourself then submit Learning Target Log/Submit

50. Lets Play Who wants to be a Millionaire Game Check for Understanding