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Blue Pennies from a Tarnish Reaction

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1 MB|4 pages
Product Description
The formation of tarnish is an excellent example of a chemical reaction between a gas and a solid. In this colorful activity, atmospheric oxygen reacts with the copper atoms on post and pre-1982 pennies to produce a blue-green tarnish that is called malachite. The activity is easy to run, all you need are a few rolls of pennies. Students can discover that pennies made before 1982 produce more blue tarnish that pennies made after 1982.

The materials, procedure and result table are provided for students to cut and paste into their notebooks. The recipe for the solution is provided as are handy document camera images of attractive malachite ores, polished gems and jewelry. Simply print and use. There is also an observation page for students to discuss their results.

Check out other Middle School Science Resources for Chemical Reactions
Products and Reactants of Chemical Equations
Doubling the Reactants in a Chemical Reaction
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Baking Powder or Baking Soda?
Exothermic or Endothermic Reaction?
Temperature and Chemical Reaction Rates
Measuring Carbon Dioxide in Solution
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Mystery Powders

This product is also part of a Chemical Reaction Bundle that contains all of the resources listed above. Save 20% on each product by purchasing this high-value bundle.


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Copyright © DrDavesScience. All rights reserved by author, including copyrighted images. This product is strictly for individual use, so please do not copy for other teachers and the file itself may not be forwarded to other individuals unless you are buying multiple copies (at a 50% discount!). Do not violate copyright laws and instead direct others to this online store at TPT. The file may not be edited or modified in any way. The file may not be uploaded on any digital platform or any online file sharing service (including Google Docs, unless multiple copies have been purchased). DrDavesScience


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