The Fluorescent Oscillating Chemical Reaction Demonstration Kit is an adaptation of a classic oscillating reaction. Mix solutions and start stirring. Use the color changes to illustrate oxidation states, then sit back and enjoy the show.
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Eerie and incredibly cool! Mix colorless and orange solutions in a beaker and start stirring. The color of the solution changes from orange to green. Dim the lights, switch on a black light, and the real show begins! Observe the brilliant, fluorescent orange glow! This unique adaptation of a classic oscillating reaction is due to rising and falling concentrations of ruthenium(II) and (III) complex ions. Use the beautiful, radiant color changes to illustrate oxidation states, but then sit back and enjoy the show! Includes Teacher Demonstration Notes, a reproducible student worksheet and answer key.
Concepts: Oscillating reactions, oxidation–reduction reactions, reaction mechanisms, kinetics, catalysts.
Time Required: 20 minutes
Materials Provided: Cerium ammonium nitrate and ruthenium chloride acidified solution, malonic acid, potassium bromate, sulfuric acid solution.
Note: UV lamp or black light source is required and available separately.
Correlation to Next Generation Science Standards (NGSS)
Science & Engineering Practices
Asking questions and defining problems
Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Disciplinary Core Ideas
HS-PS1.B: Chemical Reactions
Cause and effect
Systems and system models
Scale, proportion, and quantity
HS-PS1-2: Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
HS-PS1-5: Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.
HS-PS1-6: Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.