Chem 115 Lecture_16

Chem 115 Lecture_16 - Lecture 16, 10/19/07 Solutions and...

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Lecture 16, 10/19/07 Solutions and IMF Reading: Sections 9.8 (part), pp. 408-412; Section 13.2-13.4, pp. 591-606; Section 5.8, pp. 205-212; Section14.1-14.2, pp. 658-668 Lab: Where’s the iron?
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Solubility of Ethanol E10 - a gasoline blend with 10% ethanol is widely used to reduce carbon monoxide emissions Corona (beer): contains 4.5% ethanol How can ethanol be soluble in gasoline and also soluble in water?
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Chemical Structure To understand solubility we must look at the structure and the intermolecular forces H 3 C H 2 C OH
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Hanging onto glass, the gecko’s party piece. Scientific American, June 19, 2000
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Two million densely packed, fine hairs, or "setae", on each toe. The end of each seta is further subdivided into hundreds to thousands of structures called spatulae. The stickiness of the gecko is attributed to intermolecular forces. These forces come into play because the gecko foot hairs get so close to the surface. A billion spatulae to come into intimate contact with the surface, combining to create a strong adhesive force.
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Polar Bond F Polar: Positive end and negative end
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Chem 115 Lecture_16 - Lecture 16, 10/19/07 Solutions and...

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