Day 30 – Breaking the Acid/Base Model

Tues. Oct 15, 2013

Chemistry 1 – We took a quiz today that centered around the use of particle diagrams and mass vs. volume graphs to model density.  After the quiz we reviewed how the density mathematical model was derived and worked on some practice problems using that model.

Physics 1 – We shared whiteboards that contained both x vs. t and v vs. t graphs for our robot’s motion.  Both graphs modeled the exact same motion.  After discussing such things as how we can tell the motions speed/direction/velocity/etc. we worked on some practice problems using multiple models of motion.

Chemistry 2 – Yesterday we developed a model to classify acids and bases based on a compound having H+ or OH- ions.  Today we looked at ammonia (NH3) and found it to be basic by using several indicators.  This behavior doesn’t fit the model from yesterday, so we have to revise that model.  I introduced the Bronstad-Lowry Model of Acids and Bases as a model to explain NH3, as well as the issue of H+ being too unstable on it’s own.


About bradwysocki

I teach high school Chemistry and Physics using Arizona State University's Modeling Method. The school I teach in is Bloomer HS in Northwest Wisconsin. I've been using the Modeling Method for 7 years now and have just recently begun using Standards Based Grading as a way to assess my students learning.
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