Before class on Friday, Jan. 20, please watch the following two videos and take notes on the blank notes you picked up in class.
chemistry matters
exploring the pleasure of finding things out
Before class on Friday, Jan. 20, please watch the following two videos and take notes on the blank notes you picked up in class.
chemistry matters 
I learned that in reaction mechanisms, there are elementary reactions. They can either be unimolecular, bimolecular, or termolecular. Termolecular is rare. I also learned how to predict rate laws based off of the elementary reactions.
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I discovered that reactions can take many steps in order to reach their final destination. An intermediate is the molecules that disappear while writing a net ionic equation.
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In these videos I learned about reaction mechanisms, elementary reactions, molecularity, and how to use molecularity in elementary processes to determine rate laws. When reactions occur, molecules must collide in a specific orientation with certain other molecules to form something new. This doesn’t always happen in one step so a reaction mechanism is used to describe all the steps and events that actually happen in a reaction. the pieces of these mechanisms are called elementary reactions/processes. The number of molecules that come together in a reaction is defined by its molecularity. An elementary process can be unimolecular, bimolecular and trimolecular. We can look at what combines with what and the molecularity to determine the rate law of an elementary reaction. Molecules that only appear in elementary processes (molecules that are both created and consumed by the reaction) are known as intermediates.
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*correction. An elementary reaction can not be trimolecular, it can be termolecular
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In these 2 videos, I have learned about the reaction mechanism and how all reactions occur in one or multiple elementary steps. In elementary reactions, the molecularity, or the number of molecules involved in a reaction, is known. Therefore, by looking at an elementary reaction, we can deduce the rate law.
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