Chemistry 25 Wednesday, November 1, 2006

Chemistry 25 Wednesday, November 1, 2006 - c. Fats (mostly...

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Wednesday, November 01, 2006 Chemistry CLEAN UP YOUR ACT Why don’t oil and water mix? How does a detergent help dissolve grease? Text: Sections 10.3 - 10.4 ORGANIC COMPOUNDS 1. compounds containing C a. Thousands… millions? (if no C = “inorganic”) 2. one class: hydrocarbons a. contain only H, C C – H only slightly polar molecules ~ symmetrical = non-polar molecules 3. Recall “like dissolves like” a. Hydrocarbons insoluble in water i. “hydrophobic” – water fearing As opposed to” ii. “hydrophobic” – water loving 4. What to look for: a. C – H bonds = hydrophobic b. O – H bonds c. N – H bonds hydrophilic Some of both? Depends on relative amounts 5. Some classes of compounds: a. Hydrocarbons = hydrophobic i. Figure 10.3 b. Sugars (Lots of O – H) = hydrophilic
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Unformatted text preview: c. Fats (mostly C – H, no O – H) = hydrophobic d. Acetone (polar and C – H) = both ways e. Alcohols (O – H and C – H) = both ways i. More soluble in H2O or C6H14? 1. Methanol H20 2. Butanol C6H14 Example 10.4 Wednesday, November 01, 2006 DETERGENTS 1. SDS – a “detergent” a. Hydrophobic “tail” b. Ionic “head group” FIGURE 10.4 FIGURE 10.5 Monolayer a. hydrophilic end in water b. (hydrophobic end sticks out) FIGURE 10.6 Micelle (upon agitation) a. inside – non-polar b. outside – ionic GOALS • Compare the solubility of various compounds in different solvents • Describe how a micelle forms • Describe how detergent can dissolve oil into water...
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This note was uploaded on 03/20/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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Chemistry 25 Wednesday, November 1, 2006 - c. Fats (mostly...

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