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The Two-Cent Colorful Chemical Demonstration Kit

By: Pat Funk , Watkins Memorial H.S., Patalaska, OH

Item #: AP8989

Price: $57.01

The Two-Cent Colorful Demonstration Kit is a demo with a surprise ending. Two pennies are dissolved in nitric acid, producing a green solution. The colors span the spectrum from blue to pink. As if that weren't enough, wait for the finale.

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This item can only be shipped to schools, museums and science centers

Product Details

The demo with a surprise ending! Two copper pennies are dissolved in nitric acid, producing a green solution. As the pennies dissolve, the NO2 gas produced is bubbled through a (blue) basic solution containing universal indicator. As the NO2 gas dissolves in the solution, it reacts with water to form nitric acid. The colors will span the spectrum from blue to pink as the solution becomes more acidic. As if that weren't enough color change, wait until you see the finale! (We won't spoil it.) Enough materials are included to perform the demonstration seven times. Concepts: Acid–base indicators, oxidation–reduction, reactions of metals and acids. Time Required: 25 minutes Materials Provided: Nitric acid, universal indicator solution, glass tubing (to make glass elbows), stoppers, and plastic tubing. Note: Pennies are needed, but not provided. Perform this demonstration in a fume hood or well-ventilated lab.