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Objectives: SWBAT

Objectives: SWBAT . Predict and then measure the melting points of unsaturated fatty acids Evaluate Soaps made with these fatty acids. Drill. Explain the difference between a saturated fatty acid and an unsaturated fatty acid. Homework. None. Chapter Challenge.

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Objectives: SWBAT

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  1. Objectives: SWBAT • Predict and then measure the melting points of unsaturated fatty acids • Evaluate Soaps made with these fatty acids

  2. Drill • Explain the difference between a saturated fatty acid and an unsaturated fatty acid.

  3. Homework • None

  4. Chapter Challenge • Create a procedure to make a soap from natural products that can be sold at local stores.

  5. Activity 6 Changing the Fat: Does Unsaturation Make a Difference?

  6. What Do You See? • Look at the picture on page799 and describe what you see. Be prepared to discuss with the class.

  7. What do you think? Health and nutrition reports often talk about eating “good” fats and avoiding “bad” fats. • What is “good fat” and what is “bad fat”?

  8. Investigate • Pages 799 – 804

  9. Saturated vs. Unsaturated • Saturated • Contain no double C-C bonds • Unsaturated • Contains double C-C bonds

  10. Fats and Saturation • Beef Tallow and Lard • (Stearic Acid) All single Bonds • Olive Oil – • (Oleic Acid) one double bond • Safflower oil and Sunflower oil • (Linoleic Acid) two double Bonds • Linseed Oil • (Linolenic Acid) three double bonds

  11. Fats and Saturation • Saturated Fats come primarily from Animal products • Unsaturated Fats and Oils come primarily from plants

  12. Fats and Diet • Saturated Fats • Linked to Cardiovascular Diseases • Arterial Plaque • Lead to High cholesterol • The “Bad Fats”

  13. What do You Think Now? At the beginning of this activity you were asked • What is “good fat” and what is “bad fat”? • Now that you have investigated saturated and unsaturated fats, in what category would you place saturated fats? Why?

  14. Chem Essential Questions • What does it mean? • Macro • List some macroscopic properties of soap that you observed

  15. Chem Essential Questions • What does it mean? • Nano • Explain in words how increasing the number of double bonds in a fat alters its physical properties

  16. Chem Essential Questions • What does it mean? • Symbolic • Use drawings to show how increased numbers of double bonds affects the properties of fats

  17. Chem Essential Questions • How do you know? • What evidence do you have that unsaturated and saturated fats have different melting points?

  18. Chem Essential Questions • Why do you believe? • In advertising and in the news, you often hear terms related to fats such as: saturated, unsaturated, poly-unsaturated, hydrogenated, etc. What effect will hydrogenating a poly-unsaturated fat have in terms of its physical state?

  19. Chem Essential Questions • Why should you care? • Showing how changes bring about desirable properties will be a major bonus when it comes to selling your idea of a new improved soap to company executives. Explain whether or not your soap will be unsaturated and the basis of your choice in terms of desirable properties

  20. Reflecting on the Activity and the Challenge Page 808

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