Thursday, May 10, 2007
Thurs-Day 4
Honors: we reviewed oxidation numbers and used them to show which REACTANT was oxidized (the REDUCING AGENT) and which REACTANT was reduced (the OXIDIZING AGENT). We defined the terms oxidizing agent (oxidizer) and reducing agent (reducer) based on what the respective reactant DOES/CAUSES, not based on what happens TO the reactant.
We then used the oxidation numbers in balancing a redox reactions via the oxidation number method (there is another method called the "half-reaction method" or the "ion-electron" method but that is not the method asked for on the Regents).
We will do more of these tomorrow and then start on the second part of the unit: electrochemistry.
Regents: we reviewed oxidation numbers and used them to show which REACTANT was oxidized (the REDUCING AGENT) and which REACTANT was reduced (the OXIDIZING AGENT). We defined the terms oxidizing agent (oxidizer) and reducing agent (reducer) based on what the respective reactant DOES/CAUSES, not based on what happens TO the reactant.
We then used the oxidation numbers in balancing a redox reactions via the oxidation number method (there is another method called the "half-reaction method" or the "ion-electron" method but that is not the method asked for on the Regents).
We will do more of these tomorrow and then start on the second part of the unit: electrochemistry.
AP: we reviewed another part II exam focusing on the alum synthesis lab. We discussed proper lab procedure for pipetting a given quantity of acid followed by a dilution to known molarity. This was followed by some stoichiometric calculations and error analysis (always on the lab question). We also did a weak acid equilibrium ending with adding a strong base, which formed a buffer enabling us to use the Henderson-Hasselbalch equation.
We have just a few more exams to go; we've already seen and done just about everything so we will begin to focus more on test-taking strategies and minutiae.
We then used the oxidation numbers in balancing a redox reactions via the oxidation number method (there is another method called the "half-reaction method" or the "ion-electron" method but that is not the method asked for on the Regents).
We will do more of these tomorrow and then start on the second part of the unit: electrochemistry.
Regents: we reviewed oxidation numbers and used them to show which REACTANT was oxidized (the REDUCING AGENT) and which REACTANT was reduced (the OXIDIZING AGENT). We defined the terms oxidizing agent (oxidizer) and reducing agent (reducer) based on what the respective reactant DOES/CAUSES, not based on what happens TO the reactant.
We then used the oxidation numbers in balancing a redox reactions via the oxidation number method (there is another method called the "half-reaction method" or the "ion-electron" method but that is not the method asked for on the Regents).
We will do more of these tomorrow and then start on the second part of the unit: electrochemistry.
AP: we reviewed another part II exam focusing on the alum synthesis lab. We discussed proper lab procedure for pipetting a given quantity of acid followed by a dilution to known molarity. This was followed by some stoichiometric calculations and error analysis (always on the lab question). We also did a weak acid equilibrium ending with adding a strong base, which formed a buffer enabling us to use the Henderson-Hasselbalch equation.
We have just a few more exams to go; we've already seen and done just about everything so we will begin to focus more on test-taking strategies and minutiae.
# posted by C @ 2:47 PM 
