With Fenton's Reagent Environmental Chemical Demonstration Kit, show students the oxidizing power of this “old-time” chemical concoction by breaking down a series of colorful and fluorescent organic molecules.
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H. J. H. Fenton, an English chemist, discovered in 1894 that some metal ions, particularly the iron(II) ion, catalyze the decomposition of hydrogen peroxide to generate highly reactive intermediates. Fenton’s reaction has been “rediscovered” and is now used to break down a large variety of water and soil pollution molecules, e.g. phenols, pesticides, and rubber chemicals. Show students the oxidizing power of this “old-time” chemical concoction by breaking down a series of colorful and fluorescent organic molecules. Includes valuable Teacher Notes with helpful teaching tips, reproducible student worksheets, and enough materials to perform the demonstration seven times. Concepts: Catalyst, green chemistry, emission spectra, redox reactions. Time Required: 20 minutes Materials Provided: Hydrogen peroxide, ferrous ammonium sulfate, sulfuric acid solution, green food dye solution, tonic water (quinine), fluorescein solution, test tubes.
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
Constructing explanations and designing solutions
Disciplinary Core Ideas
HS-PS1.A: Structure and Properties of Matter
HS-PS1.B: Chemical Reactions
HS-PS3.A: Definitions of Energy
HS-PS3.D: Energy in Chemical Processes
Cause and effect
Systems and system models
Energy and matter
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-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.