Friday, January 8, 2010
Fri-Day 2
Bio 3/6 - we discussed the adaptation of the small intestine for efficient/maximum nutrient absorption via the finger-like projections called villi through which amino acids, nucleotides, glucose, and fatty acids diffuse into the bloodstream.
We looked at the major nutrients and their functions in the body.
We then discussed the causes and treatments of five common disorders/diseases/failures to maintain homeostasis that occur in organs of the digestive tract: ulcers, appendicitis, gallstones, constipation and diarrhea.
AP Chem - We discussed two types of Raoult's Law graphs: one plots vapor pressure vs. mole fraction in the liquid phase of a two-component mixture and the other plots temperature/boiling points vs. mole fraction in the liquid phase (the lower curve) as well as the vapor phase (the upper curve). The former graph shows the partial pressures of each component in the vapor phase given a particular mole fraction of each component in the liquid phase; the latter graphs shows the different mole fractions between the vapor phase and liquid phase mixture (as in a distillation column/apparatus) that are in equilibrium (as seen by a horizontal line at a given boiling point; the vapor phase mixture that an increased mole fraction of the component that has weaker intermolecular forces. When this vapor phase mixture is then condensed and cooled further (vertical line down) to a liquid mixture, the weaker IMFA component is increased in proportion in that mixture.
We discussed metal-ligand complexes as forming from LEWIS acid-base reactions. The Lewis acid is the electron-pair ACCEPTOR i.e. the metal cation with the empty hybridized sp3, sp3d, or sp3d2 orbitals ACCEPTS a lone pair of electrons from the ligand to form a coordinate covalent bond, the pair of electrons from the ligand now sandwiched between the positive nuclei of the ligand and of the transition metal.
We will go over writing the descriptive chem answers and strategies for this type of reaction. We noted that the number of ligands that bind to a given transition metal ion of charge "n+" is 2 times "n".
# posted by C @ 7:35 AM 
