Wednesday, October 22, 2008
Wednes-Day 1
AP Chem- we finished the "percent yield" problem and discussed the meaning of high yield vs. poor yield in a given chemical (usually organic) reaction pathway/mechanism. Conditions that lead to a larger number of "side or alternate reactions" will produce a lower yield of the desired product.
We then reviewed the unit for solutions: Molarity.
We saw the four parts of the equation and via algebraic rearrangement, showed how to solve for the required grams of reactant to make a solution of known molar concentration and volume.
We then discussed the basis and meaning of the "dilution formula", ViMi = VfMf , which shows that moles/grams of dissolved solute do not change when solvent is added!
We then did a solution stoichiometry problem (acid-base neutralization) both with and without a limiting reactant.
Bio 6/7- we performed the other part of the NY State Lab on cell transport/diffusion.
We will finish the writeup discussion on that lab on Friday.
We then revisited mitosis/cytokinesis as we started to focus on some of the end results of the mitosis and cell division process.
Bio 8- we reviewed the reasons for cell division (divide or die) and then discussed and viewed images of the phases of mitosis and cytokinesis.
The 5 phases can be remembered by using the mnemonic: IPMAT.
We noted the changes that occur during each phase of mitosis and saw how to relate the picture of a dividing cell to its particular phase in mitosis.
We then reviewed the unit for solutions: Molarity.
We saw the four parts of the equation and via algebraic rearrangement, showed how to solve for the required grams of reactant to make a solution of known molar concentration and volume.
We then discussed the basis and meaning of the "dilution formula", ViMi = VfMf , which shows that moles/grams of dissolved solute do not change when solvent is added!
We then did a solution stoichiometry problem (acid-base neutralization) both with and without a limiting reactant.
Bio 6/7- we performed the other part of the NY State Lab on cell transport/diffusion.
We will finish the writeup discussion on that lab on Friday.
We then revisited mitosis/cytokinesis as we started to focus on some of the end results of the mitosis and cell division process.
Bio 8- we reviewed the reasons for cell division (divide or die) and then discussed and viewed images of the phases of mitosis and cytokinesis.
The 5 phases can be remembered by using the mnemonic: IPMAT.
We noted the changes that occur during each phase of mitosis and saw how to relate the picture of a dividing cell to its particular phase in mitosis.
# posted by C @ 1:31 PM 
