Pink and Blue - A Colorful Chemical Balancing Act - Chemical Demonstration Kit
By: Jim and Julie Ealy, Retired , The Peddie School, Hightstown, NJ
Item #: AP8471
The Pink & Blue: The Effect Of Concentration & Temperature on Equilibrium Demonstration Kit is an updated classic, proving the power of balance in a reversible chemical reaction. Students are then able to explain LeChâtelier's Principle.
This item can only be shipped to schools, museums and science centers
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 reactants and products and the temperature are changed. Students observe how a reaction at equilibrium responds immediately to conditions that upset its chemical balance. As students visualize the dynamic nature of equilibrium, they are able to explain in their own words how LeCh,telier's Principle works and why it makes good chemical sense. Whether you want to show only qualitative effects or to develop a more quantitative treatment with equilibrium constant examples, this demonstration is perfect for your classroom needs.
Teacher Demonstration Notes included. Enough materials are provided to perform the demonstration seven times.
Concepts: Equilibrium, LeCh,telier's Principle, endothermic vs. exothermic reactions.
Time Required: 20 minutes
Chemicals Provided: Cobalt chloride solution, hydrochloric acid, silver nitrate solution.
Note: Perform this demonstration in a fume hood or well-ventilated lab.