Thursday, December 11, 2008
Thurs-Day 2
AP Chem- I will post the specific HW problems that you can handle so far; do not attempt the others yet. If we do not cover certain questions by test time, those questions will not be tested/graded on the hw. I will also post some videos/tutorials/solved problems. Check them.
We reviewed the basis and details of our electronic and molecular geometry chart, noting that the Lewis Structure will determine what general formula (AX2 or AX2E or AX4 etc.) to use.
We then covered the case of AX2E, which generally will involve resonance structures. Resonance structures in Lewis representations are more accurately seen as DELOCALIZED PI bonding in our orbital diagrams and pictures. In SO2, there are two p/pi electrons shared evenly among the three nuclei, which creates some extra stabilization (more than in just a single LOCAL pi bond).
DO NOT WORRY ABOUT THE HYBRIDIZATION OR lack of hybridization of the TERMINAL ATOMS! You cannot/will not be asked for such information because it cannot consistently be determined or is not even necessary in order to explain the experimental evidence on molecular geometry.
Now that we have delocalized pi bonding done, the rest of the chart can be completed much more quickly.
Bio 6- we discussed the three general types of muscle tissue: compared and contrasted them in terms of voluntary or involuntary, striated/striped vs. non-striated, and noted the main location(s) of each type of muscle tissue.
We then began to look at the integumentary system/the skin. We will further discuss the structure and function of each layer of tissue that makes up the skin organ.
Bio 7/8- we discussed the various diseases/injuries of joints and tendons: arthritis, tendonitis, and gout; then we talked about the three general types of muscle tissue: compared and contrasted them in terms of voluntary or involuntary, striated/striped vs. non-striated, and noted the main location(s) of each type of muscle tissue.
We then began to look at the integumentary system/the skin. We will further discuss the structure and function of each layer of tissue that makes up the skin organ.
We reviewed the basis and details of our electronic and molecular geometry chart, noting that the Lewis Structure will determine what general formula (AX2 or AX2E or AX4 etc.) to use.
We then covered the case of AX2E, which generally will involve resonance structures. Resonance structures in Lewis representations are more accurately seen as DELOCALIZED PI bonding in our orbital diagrams and pictures. In SO2, there are two p/pi electrons shared evenly among the three nuclei, which creates some extra stabilization (more than in just a single LOCAL pi bond).
DO NOT WORRY ABOUT THE HYBRIDIZATION OR lack of hybridization of the TERMINAL ATOMS! You cannot/will not be asked for such information because it cannot consistently be determined or is not even necessary in order to explain the experimental evidence on molecular geometry.
Now that we have delocalized pi bonding done, the rest of the chart can be completed much more quickly.
Bio 6- we discussed the three general types of muscle tissue: compared and contrasted them in terms of voluntary or involuntary, striated/striped vs. non-striated, and noted the main location(s) of each type of muscle tissue.
We then began to look at the integumentary system/the skin. We will further discuss the structure and function of each layer of tissue that makes up the skin organ.
Bio 7/8- we discussed the various diseases/injuries of joints and tendons: arthritis, tendonitis, and gout; then we talked about the three general types of muscle tissue: compared and contrasted them in terms of voluntary or involuntary, striated/striped vs. non-striated, and noted the main location(s) of each type of muscle tissue.
We then began to look at the integumentary system/the skin. We will further discuss the structure and function of each layer of tissue that makes up the skin organ.
# posted by C @ 10:39 AM 
