Tuesday, October 14, 2008
Tues-Day 1
AP Chem- we did some more "molar mass" calculations of salts and hydrates. We calculated the % water in a hydrated salt and then did the percent composition to empirical formula calculation, explaining the logic of choosing a 100. g sample and then seeing that we are trying to get the mole ratio of atoms (or ions) in a given compound. The important lesson that you will NOT SEE in any text is how much you can "round up or down" in these particular problems. We also drilled decimal to fraction to multipliers so that you know what to do when you solve for empirical formula and you initially do NOT get a nice whole number ratio.
We began our lab on % composition of a hydrate, a gravimetric analysis with which we will determine its empirical formula.
Bio 6/7- we did examples of passive transport, particularly "facilitated diffusion", which is regular diffusion but with the "help" of a transport protein channel; no net energy input is needed for this process, of course.
We contrasted that with an example/illustration of "active transport", which is an energy REQUIRING process; the energy is supplied by using up ATP molecules for the energy stored in their bonds.
We then finished our plant and animal cell lab.
Bio 8- we did examples of passive transport, particularly "facilitated diffusion", which is regular diffusion but with the "help" of a transport protein channel; no net energy input is needed for this process, of course.
We contrasted that with an example/illustration of "active transport", which is an energy REQUIRING process; the energy is supplied by using up ATP molecules for the energy stored in their bonds.
We began our lab on % composition of a hydrate, a gravimetric analysis with which we will determine its empirical formula.
Bio 6/7- we did examples of passive transport, particularly "facilitated diffusion", which is regular diffusion but with the "help" of a transport protein channel; no net energy input is needed for this process, of course.
We contrasted that with an example/illustration of "active transport", which is an energy REQUIRING process; the energy is supplied by using up ATP molecules for the energy stored in their bonds.
We then finished our plant and animal cell lab.
Bio 8- we did examples of passive transport, particularly "facilitated diffusion", which is regular diffusion but with the "help" of a transport protein channel; no net energy input is needed for this process, of course.
We contrasted that with an example/illustration of "active transport", which is an energy REQUIRING process; the energy is supplied by using up ATP molecules for the energy stored in their bonds.
# posted by C @ 4:05 PM 
