Day 47: Modeling Microscopic Collisions


We just finished with momentum and macroscopic collisions and this activity (two different size BBs in sealed petri dishes) is a nice bridge between those and microscopic collisions. At the end the students are able to better see how changing temperature (increase the shake frequency) and concentration (2nd petri dish has double the BBs) affects the number of collisions in a chemical reaction. Later this week we will look at an acetone-HCl-iodine clock reaction and how these two variables affect the rate of the reaction.

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