Blue Pennies from a Tarnish Reaction

Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
Blue Pennies from a Tarnish Reaction
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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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Combustion and the Fire Triangle
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.

CHEMICAL REACTION BUNDLE

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Highest Value Full Middle School Chemistry Bundle
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Link to Chemistry Home Page
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Copyright © DrDavesScience. All rights reserved by author, including copyrighted images. This product is strictly for individual use and may not be copied for other teachers. The file itself may not be forwarded to other individuals unless multiple copies have been purchased. The file may not be edited or modified in any way and may not be uploaded onto any digital or online file sharing platform unless permission has been granted by DrDavesScience.



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