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Environmental Chemistry
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  Environmental Chemistry, continued
Nitrogen Oxides and Acid Rain—
Demonstration Kit
By: The Flinn Staff
When nitrogen and oxygen—the two primary components of the air we breathe—combine under certain conditions the results can be devastating. In this demonstration, nitrogen oxides are generated by the dissolution of copper in nitric acid and the resulting gases bubbled into a larger container of water containing an indicator. As the water shifts from near neutral to highly acidic, the color change is dramatic and unmistak- able. And just when the reaction appears to be complete... a breathtaking surprise! Accentuate your discussion of acid rain and its causes with this remarkable demonstration. Instructor’s Demonstration Notes included. Concepts: Environmental chemistry, acid–base indicators.
Time Required: 15 minutes
Materials Provided: Phenol red solution, nitric acid, filtering flask, Parafilm®, plastic tubing, and rubber stoppers.
Note: Pre-1982 pennies and a large flask are needed, but not provided. Perform this demonstration in a fume hood or well-ventilated lab.
Nanotechnology
Commercial Ferrofluid—
Chemical Demonstration Kit
Ferrofluid, first developed by NASA in the 1960s,
consists of nano-sized magnetic particles suspended
in a liquid. Your students will be fascinated as you demonstrate the unique properties of this nanoscience material and produce interesting 3-dimensional magnetic sculptures. ChemFax with suggested demon- stration instructions and handling tips is included.
Concepts: Nanotechnology, magnetic properties, colloids vs. solutions. Time Required: 15 minutes
Materials Provided: Ferrofluid, 50 mL.
Note: A magnet is required and available separately.
Ferrofluid Nanotechnology—
Chemical Demonstration Kit
By: The Flinn Staff
A magnetic liquid, also known as a ferrofluid, may seem like a space- age concept. That’s because it is! Now you can prepare a ferrofluid and demonstrate the concept that was invented by NASA in the 1960s to control liquids in space. The procedure is remarkably simple. Magnetite (Fe3O4) is prepared by combining Fe2+ and Fe3+ ions with a weak base in dilute aqueous solution. The resulting magnetite particles are extremely small nanoparticles. Shrinking the size of solid-phase particles to the nanometer scale—one-billionth of a meter—radically changes their physical and chemical properties. Rather than settle out as a solid, the magnetite particles remain suspended in the aqueous medium, giving rise to a magnetic liquid! Place a magnet under the liquid in a Petri dish or vial, and the liquid will form dramatic spikes. Nanotechnology may well be the next “big thing” in science—pun intended. Update your curriculum today!
Concepts: Ferrimagnetic substances and magnetic properties, colloids vs. solutions, nanotechnology.
Time Required: 10 minutes
Materials Provided: Iron(II) chloride and iron(III) chloride, ammonia solution, tetramethylammonium hydroxide solution, hydrochloric acid solution, neodymium magnet, Pasteur pipets, and weighing dishes. Note: Perform this demonstration in a fume hood or well-ventilated lab.
Nitrogen Oxides and Acid Rain— Demonstration Kit FB0011
                 Catalog No.
  Description
  Price/Each
   FB0011
 Nitrogen Oxides and Acid Rain— Demonstration Kit
   $74.25
                   Catalog No.
  Description
  Price/Each
   AP7432
 Commercial Ferrofluid— Chemical Demonstration Kit
   $40.45
                Commercial Ferrofluid—Chemical Demonstration Kit
AP7432
   Catalog No.
  Description
  Price/Each
   AP7118
 Ferrofluid Nanotechnology— Chemical Demonstration Kit
   $49.20
 NANOTECHNOLOGY continued on next page.
Ferrofluid Nanotechnology—Chemical Demonstration Kit AP7118

















































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