Ward's® AP Chemistry Investigation 13: Equilibrium: Can we Make the Colors of the Rainbow?

Meets AP Science Practices 4, 5, and 6

In this lab, chemical equilibrium and Le Chatelier's principle will be explored as students study the effect of concentration, pressure, volume, and temperature on systems at equilibrium. Students will be studying an acid-base-indicator equilibrium, a hydrated cobalt complex-alcohol equilibrium, and a seltzer water-indicator equilibrium. Students will be required to apply different stresses to these equilibrium reactions and observe how the system responds via a color change. The information learned from these tests will ultimately be used to produce solutions that make up all the colors of the rainbow. Includes bromothymol blue, hydrochloric acid, sodium hydroxide, sodium chloride, cobalt (II) chloride, ethanol, acetone, silver nitrate, seltzer water, methyl red, leur lock syringes and caps. Requires test tubes, available separately.

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Includes:
Bromothymol Blue pH Indicator
Hydrochloric Acid
Sodium Hydroxide
Sodium Chloride
Cobalt(II) Chloride
Ethanol
Acetone
Silver Nitrate
Seltzer Water
Methyl Red pH Indicator
Luer Lock Syringes
Syringe Tip Cap

Required but Not Provided: DI Water, Spatulas, Beakers, Graduated Cylinders, Test Tubes/Racks, Stirring Rods, Ice, Hot Water, Thermometers, Gloves, Safety Goggles, Lab Aprons.