Video: Making polystyrene dissolve like magic

Have you ever seen a foam cup appear to melt away in acetone? Foam cups, bowls and containers are made of a lightweight but strong material - expanded polystyrene. How then does acetone reduce this substance to a blob of goo?
In this week's video, Reactions teams up with chemistry professor Matt Hartings, Ph.D., to explain the viral phenomenon.
Check it out here:
Provided by American Chemical Society