Tuesday, March 20, 2007
Mon-Day 2
Honors: we covered the time and rate versions of Graham's Law in all of their permutations. Then, we reviewed properties of gases, liquids, and solids.
Regents: we did a cooling curve heat loss calculation and then did a question set from Topic 4, which will be the focus of tomorrow's exam.
AP: we went from calculation of molar solubility of a sparingly soluble salt to the molar solubility of that salt in a solution with a common ion. This is an example of a Le Chatelier suppression of dissociation of the salt. Generally, in the ICE table calculation, you will ignore the dissociation of the common ion from the insoluble salt relative to the common ion's concentration from the common ion salt. We calculated the percent dissociation with and without the common ion present in solution.
We then went on to "will a precipitate form?" problems, which involves comparing Ksp vs Qsp.
Writing the dissolution equation in the correct order is crucial.
We finished with a lengthy, will a precip form into a "how much precip forms?" problem.
Regents: we did a cooling curve heat loss calculation and then did a question set from Topic 4, which will be the focus of tomorrow's exam.
AP: we went from calculation of molar solubility of a sparingly soluble salt to the molar solubility of that salt in a solution with a common ion. This is an example of a Le Chatelier suppression of dissociation of the salt. Generally, in the ICE table calculation, you will ignore the dissociation of the common ion from the insoluble salt relative to the common ion's concentration from the common ion salt. We calculated the percent dissociation with and without the common ion present in solution.
We then went on to "will a precipitate form?" problems, which involves comparing Ksp vs Qsp.
Writing the dissolution equation in the correct order is crucial.
We finished with a lengthy, will a precip form into a "how much precip forms?" problem.
# posted by C @ 1:27 AM 
