Chemical Mystery #10: Out of the Blue!

the demo in action

In this simple trick, colors are made to "magically" appear and disappear on a straw. This science experiment is very easy to do...if you know your chemistry!

Chemistry in a Bottle

density bottles

Are you familiar with the dynamic density bottle experiment? This interesting experiment was invented by Lynn Higgins, and is sold by various science supply companies. Two immiscible liquids (usually salt water and isopropyl alcohol) and two different types of plastic pieces are contained within a dynamic density bottle. The plastic pieces display curious floating and sinking behavior when the bottle is shaken. 

Dry ice in five different liquids

Dry ice in five different liquids

You probably know what happens when you place dry ice in water. Do you know what happens when dry ice is placed in acetone or glycerin? Read this and find out!

Vapor Pressure: Molecular Polarity

The vapor pressures of chloromethane and dichloromethane are compared using barometers to show the effect of polarity on vapor pressure.