Mini-Project Sequence: Orange Peels and Polarity

students working with balloons

The author shares a series of resources she has created that are built around a post here on ChemEd X about popping a balloon with an orange peel and the concept of polarity.

Floating Squares

floating squares

I was looking for a new demonstration to initiate a discussion about polarity and related properties to use as part of an exam review. I found a video at ChemEd X (this is part of a ChemEd X subscription). It is entitled “Floating Squares – Hexane and Water” (see note below). I have placed both solutions together before, but I had not added the squares. The demonstration fulfilled my needs. I could have used the original video and muted it if I had not had hexane to demonstrate with.

Chemistree Holiday

My ChemClub students came to my room for a holiday celebration today. We made a batch of sea foam candy, an Elephant Toothpaste Christmas Tree, and marbled gift tags.

Hydrophobic vs. Hydrophilic, Polar vs. Non-polar

Wow! A very neat experiment, called “Hydroglyphics”, published by Kim, Alvarenga, Aizenberg, and Sleeper in the Journal of Chemical Education allows you to transform a common plastic Petri dish into a unique teaching tool to demonstrate the difference between hydrophobic and hydrophilic surfaces. Check it out in the video.