Chemistry

In this set of three demonstrations, students will observe a series of dramatic changes when common ions are added to solutions at equilibrium. The results illustrate the nature of equilibrium and LeChâtelier’s principle.• Adding strong and weak acid...

An ingenious idea to introduce and demonstrate phase diagrams and triple point using dry ice. At atmospheric pressure carbon dioxide exists only as a solid or gas. However, in a closed system, liquid carbon dioxide will exist when the pressure exceed...

It's bubbly, it's colorful-it's equilibrium in a syringe! Use ordinary seltzer water, an acid-base indicator and a large syringe to transform a common gas solubility phenomenon into an exciting, hands-on demonstration. An acid-base solution is added ...

Finally-an amazing and easy way to demonstrate diffusion, vapor pressure, intermolecular bonding, and even Raoult's Law. Simply sprinkle a few crystals of two solids into opposite quadrants of a divided Petri dish. Add a little acetone to a third qua...

Challenge students to explain the phenomenon observed in this amazingly simple but intriguing demonstration. Pour some violet colored solution into three different test tubes. Place one tube in cold water—the solution turns pink, from the bottom up. ...

Demonstrate the power of balance in a reversible chemical reaction with this updated version of a classic demonstration! A solution of cobalt chloride turns from pink to blue and back again in a series of transformations as the concentrations of reac...