tCH 7.2 - Review Intermolecular attractions Ion-dipole...

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Unformatted text preview: Review Intermolecular attractions Ion-dipole Dipole-dipole Dipole-induced dipole Induced dipole-induced dipole Dipole - Dipole Two dipole molecules will also attract each other n Ex. the attraction of one water molecule to another Hydrogen bond Water has a special dipole – dipole attraction called a hydrogen bond n A hydrogen bond can occur when a hydrogen is attached to a very electronegative element like F, N or O. n The hydrogen then interacts with the lone pair of electrons on another molecule While hydrogen bonds are weaker than an ionic or covalent bond, they are very strong in regards to inter molecular attractions n Water hydrogen bonds which helps give it its very high boiling point Which pair of molecules is most likely to have a dipole-dipole interaction? 1) NaCl, NaCl 2) NaCl, H 2 O 3) CO 2 , O 2 4) CO 2 , H 2 O 5) H 2 O, FCl Dipole – I nduced dipole Molecules that are non polar like O 2 can temporarily become polar when around polar molecules such as water n This is called an induced dipole and is the result of a temporary uneven distribution of electrons Like dissolves Like n O 2 is a nonpolar molecule but can be dissolved in water due to induced dipole effect Another example is Saran Wrap (plastic wrap) I nduced Dipole – I nduced...
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This note was uploaded on 04/14/2008 for the course CHEM 1305 taught by Professor Mason during the Spring '08 term at Texas Tech.

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tCH 7.2 - Review Intermolecular attractions Ion-dipole...

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