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Teaching Methods

Kinetics

Started almost 2 years ago by Alyse Riehl.


Hello!  I am starting the Kinetics unit in my class tomorrow.  I have the stuff I have done in the past, but I was wondering if anyone has any special demos they like to start this section with, or particular points that you like to make? Thanks!


3 Comments

  • Alyse Riehl

    Posted almost 2 years ago

    The demos, I mean! I will definitely take a look at the lab.

  • Alyse Riehl

    Posted almost 2 years ago

    Thank you so much! I am going to do those today and I'll let you know how it goes.

  • Kimberly Duncan

    Posted almost 2 years ago

    Hi Alyse - I started out Kinetics with a series of short demonstrations to show the effect of concentration temperature, surface area, and a catalyst on the rate of reaction. I had a couple of different demos for concentration, but the easiest was placing zinc into HCl of different concentrations (1M, 3M, and 6M) and observing the difference in reaction rate. For temperature I dropped a glowstick in hot and cold water. For surface area I held a piece of iron (a nail) in a flame and then also put a bit of iron powder in the flame. For a catalyst I added starch solution to hydrogen peroxide. They are simple demos, but led to a good discussion about reaction rates. I did the attached lab after we finished reaction rates - it always got really good results. I had my students practice reaction mechanisms with this website: http://chemistry2.csudh.edu/lecture_help/mechanisms.html.