CHE 4341 Chapter Notes - Chapter 2 - (water): Osmosis, Ammonia, Protein Purification
Document Summary
Molecular structure of water considering lone pairs = tetrahedral otherwise, bent. 2/3 mass of human body = water reactivity of many functional groups depend on ph. Hexagonally packed [honeycomb] network that fully satisfies the h-bonding potential of water. Poor for: nonpolar solutes (average 3. 4 h-bonds per water molecule, instead of 4) (reorient every pico second rapid fluctuation) (short term water interactions however are tetrahedral in nature) Water molecules organize in an h-bond network around non-polar solute to accommodate a. Hydrophobic interactions/effect nonpolar solute gets immersed in water. Molecules in this state = clathrates (gas hydrates) example = methane in the deep ocean floor. An increase in order; so decrease in entropy. After this, molecules achieve by excluding a non-polar solute* water molecules begin to exclude the nonpolar solute so that they can restart interacting w/each other. *hydrophobic interactions are entropically driven by the overall increase in entropy that. This is to regain a high entropy/increased state of disorder.
