Wednesday, December 17, 2008
Wednes-Day 1
AP Chem- we reviewed the comprehensive Lewis--General Formula--Orbital Hybridization--Electron Geometry--Molecular Geometry--Molecular Polarity chart and saw the overall connections that we can make between each pair of columns in order to affirm our answer to a given problem.
We then discussed the polarity of covalent bonds in terms of Zeff, OPEL's, and/or electronegativity differences. We then introduced the trivial concept of "CHARACTER", that is, the lower the electronegativity difference between two bonded elements, the more covalent the "character" of the bond whether it is ionic or covalent by definition. The greater the electronegativity difference between the two bonded elements, the more ionic the "character" of the bond.
We briefly discussed average bond enthalpy, which we will finish tomorrow before some review (come to class with questions ready- do some of the online practice tests/worksheets FIRST).
I will not be covering ionic compound lattice energy tomorrow so I will not be testing that in this class on Friday's exam. Lattice energy will be discussed before the next exam, though.
Bio- we had our Muscle/Bones/Skin exam today; for the double period, we discussed the perspiration lab.
We then discussed the polarity of covalent bonds in terms of Zeff, OPEL's, and/or electronegativity differences. We then introduced the trivial concept of "CHARACTER", that is, the lower the electronegativity difference between two bonded elements, the more covalent the "character" of the bond whether it is ionic or covalent by definition. The greater the electronegativity difference between the two bonded elements, the more ionic the "character" of the bond.
We briefly discussed average bond enthalpy, which we will finish tomorrow before some review (come to class with questions ready- do some of the online practice tests/worksheets FIRST).
I will not be covering ionic compound lattice energy tomorrow so I will not be testing that in this class on Friday's exam. Lattice energy will be discussed before the next exam, though.
Bio- we had our Muscle/Bones/Skin exam today; for the double period, we discussed the perspiration lab.
# posted by C @ 2:42 PM 
