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If you are trying to make laughing gas, N2O, and you make N2O5 instead, you now have a highly dangerous chemical. So how do you control what you make when they have the same ingredients? The 14th video in a series of 29 explains how the same elements can make different substances. It also works through how to solve when you know the molecular mass in order to identify which substance you have.
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Instructional Ideas
- Create an additional guided practice problem comparing ethane (C2H6) with propane (C3H8)
Classroom Considerations
- Ensure each pupil can easily see and read a periodic table
- Requires prior knowledge from the earlier videos in the series
Pros
- Includes a prompt to pause the video to try solving before seeing the correct solution
- Brief video stays focused on a very limited topic
Cons
- None