Wednesday, February 11, 2009
Wednes-Day 1
AP Chem- we did several permutations of gas-solid equilibrium problems in which we either determined the equilibrium concentrations of reactants and products or we determined the equilibrium constant based on initial conditions and the stoichiometry of the reaction (which we organize all in one ICE table).
We saw the important case in which solids or liquids are added to equilibrium solid-gas mixtures; adding a solid or liquid (not the solvent) changes NOTHING because solids and liquids are not part of any equilibrium constant expression. The ONLY change, of course, is that you have/see more of the unreacted solid that you just added to the container.
We discussed the 3-STEP Le Chatelier method for predicting shifts in systems.
This explains nothing but it is very useful in predicting whether or not a given stress will make more or less of a desired (or undesirable) reactant or product.
We will give the REAL kinetics explanation of HOW stresses CAUSE shifts. Once you know the real deal, Le Chatelier is convenient but superfluous.
We saw the important case in which solids or liquids are added to equilibrium solid-gas mixtures; adding a solid or liquid (not the solvent) changes NOTHING because solids and liquids are not part of any equilibrium constant expression. The ONLY change, of course, is that you have/see more of the unreacted solid that you just added to the container.
We discussed the 3-STEP Le Chatelier method for predicting shifts in systems.
This explains nothing but it is very useful in predicting whether or not a given stress will make more or less of a desired (or undesirable) reactant or product.
We will give the REAL kinetics explanation of HOW stresses CAUSE shifts. Once you know the real deal, Le Chatelier is convenient but superfluous.
Bio 6/7- check out this animation on vaccinations:
Discussed the human immune system's general forms of protection: skin/epidermis, saliva, sweat, and tear enzymes, histamines, interferon, fever, and macrophages.
We then did a worksheet on various aspects of immunity.
We explained Koch's postulates/method for determining the specific pathogen that causes a disease.
There are two situations in which Koch's postulates must be altered: 1. since viruses cannot replicate outside of a host cell, viruses cannot be "grown" on nutrients in a petri dish; however, viruses can be isolated from a given sample of fluid.
2. the pathogen that is infecting a human must be able to cause the same infection in a mouse or some similar mammal because it is considered unethical for a scientist to inject pathogens into humans (even volunteers) in a scientific trial/experiment.
We further discussed and planned the Making Connections lab.
Bio 8- check out this animation on vaccinations:
http://www.immunisation.nhs.uk/About_Immunisation/Science/How_immunisation_works_-_animation
Discussed the human immune system's general forms of protection: skin/epidermis, saliva, sweat, and tear enzymes, histamines, interferon, fever, and macrophages.
We then did a worksheet on various aspects of immunity.
http://www.immunisation.nhs.uk/About_Immunisation/Science/How_immunisation_works_-_animation
Discussed the human immune system's general forms of protection: skin/epidermis, saliva, sweat, and tear enzymes, histamines, interferon, fever, and macrophages.
We then did a worksheet on various aspects of immunity.
# posted by C @ 10:39 AM 
