BIOL 4087 : Biochem Test1
Document Summary
2 water: electrostatic interaction, van der waals interactions. Ionization in water: ph, buffers, hensen hasselbach equation. Random facts: h20 is 60-70% of most animals, solvent of life, water determines shape and interaction with other molecules, water is polar, oxygen is electronegatice, hydrogen is electropositive, non-covalent interactions. That makes them reversible at body temperature (dynamic) Amphipathic molecule part hydrophobic (tail) part hydrophilic (head: bundle of amphipathic molecules for circular micelle. Ionization in water: h20 (h+) + (oh-, keq = [h+][oh-]/[h2o, std concentration of [h2o] = 55. 5m, ion product of water kw = [h+][oh-] = 1e-14 @25 degrees c, a. ph, ph=-log[h+] Log[1e-8] = ph 8 in neutral solution [h+]=[oh-] = 1e-7 = ph 7: acids and bases, strong acids/bases completely dissociate. Hcl h+ + cl: weak acids/bases partially dissociate. Nh4+ h+ + nh3: titrations adding acid to a base, or vice versa. Buffer is a weak acid or base that resists a change in ph of a solution.
