Chemblog!

AP: we reviewed our fourth AP Part II exam in which we focused on a redox titration of oxalic acid using (purple) permanganate. We emphasized the importance of using the balanced equation in any titration calculation. Tomorrow's exam covers the nuclear unit in its entirety. Study the notes, worksheets, and practice tests. We will do a redox titration and other lab activities after the exam (about one hour long) tomorrow.

Honors: We revisited Le Chatelier as we discussed the (non)-stress of adding an inert gas to a reaction mixture at equilibrium while holding T and V constant. We showed that there is literally no effect on the reaction rates and no shift; the only effect would be an increase in TOTAL pressure due to the gases but the PARTIAL pressures of the reacting gases would not change.
We then did some Bronsted conjugate acid base drills.
We then started the main quantitative part of the unit: Acid-Base Titration. We will continue with that, tomorrow.

Regents: We did some Bronsted conjugate acid base drills. We then started the main quantitative part of the unit: Acid-Base Titration. We discussed how to perform a titration and then we did a problem involving calculating the number of moles and then the molarity of an acid that was titrated by a base.