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by: Jenny Notetaker

BiochemWeek2Notes.pdf BIOC 460

Jenny Notetaker
GPA 3.3
Found/Biochem/Molecular Biol I (Lecture)
Dr. Erika Offerdahl

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About this Document

This is week 2 notes for Biochem 460. This covers hydrophobic, ionic, and hydrogen interactions, Coulomb's Law, the Henderson-Hasselbach equation, pKa, Ka, and pH.
Found/Biochem/Molecular Biol I (Lecture)
Dr. Erika Offerdahl
Class Notes
25 ?




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This 3 page Class Notes was uploaded by Jenny Notetaker on Friday September 4, 2015. The Class Notes belongs to BIOC 460 at University of North Dakota taught by Dr. Erika Offerdahl in Fall 2015. Since its upload, it has received 40 views. For similar materials see Found/Biochem/Molecular Biol I (Lecture) in Biochemistry at University of North Dakota.


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Date Created: 09/04/15
942015 OneNote Online Day 2 Monday August 31 2015 802 AM How are hydrophobic interactions different from ionic interactions and hydrogen bonding Review from Friday quot hydrogen interactions are a result of attraction between nonpolar molecules Ionic and hydrogen bonding involve charged andor polar moleculesquot No attractive force with nonpolar molecules First sentence wrong Second is wrong Van der waals is the attractive force inside the micelle quotin a hydrophobic interaction the nonpolar molecule will always repel the water moleculesquot Nonpolar molecules do not have a net charge so they are not the ones 39repelling39 Actual response should be quothydrophobic interactions are due to minimizing the number of ordered water molecules that surround the hydrophobic solute moleculesquot F Q1Q2Erquot2 F strength of the interactions between ions Q2 magnitude of the charge on the ions rquot2 Distance between charged groups E dielectric constant of the solvent Dielectric constant a quantity measuring the ability of a substance to store electrical energy in an electric field In which solvent will the ionic interaction between Na and Cl ions be the weakest Why Water dielectric constant 785 Benzene dielectric constant 46 F Q1Q2Erquot2 The larger that E is the smaller that F is Inversely related What is the order of the following interactions from Strongest to Weakest Ionic hydrogen van der Waals 1How do hydrogen bonding forces between solute molecules vary with the dielectric constant Fake answer 1 quotHydrogen bonds are electrostatic so the strength of the interactions between solute molecules decreases as the dielectric constant of the solvent increasesquot If there is a solvent is very polar solute will not be interacting as much A more nonpolar solvent increases the hydrogen bonding between solute molecules 2How do hydrophobic interactions between solute molecules vary with the dielectric constant of the solvent A A F amp fKo 3 K4 cu cooI I 4 oH 0ng Hab clI56ij Ccubcoo39 0 O I I AH 39 r r 3391 1 httpsonenoteofficeappslivecomoonenoteframeaspxFiSD6F9E59B19B584D6AI106ampHemulampC5810DM2 SKYWACWSHlampuienUSamprs 13 Jim M m age 33 W 4 Am wvm Plaza 3 1 3 6394394 ka 3951lt quot39 oKa 403 PKLquot P 74 MW fw ml 11 w HA 3H4pt A3 M 4441 WPWP Q FA httpsonenoteofficeappsivecomoonenoteframeaspxFiSD6F9E59B19B584D6Al106ampHemuampC5810DM2 SKYWACWSHampuienUSamprs 23 942015 OneNote Online quotWe httpsonenoteofficeappsivecomoonenoteframeaspxFiSD6F9E5QB198584D6Al106ampHemuampC5810DM2SKYWACWSHampuienUSamprs 33


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