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Can Ketchup Clean a Penny? #sciencegoals

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 Chemistry   |   Science
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Squeaks loves collecting shiny pennies, but sometimes he finds one that's sort of grimy and dull. Lucky for him, Jessi knows a really cool science trick to clean up those tarnished pennies!
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SOURCES:
http://buggyandbuddy.com/science-for-kids-make-a-penny-turn-green/
https://www.exploratorium.edu/science_explorer/copper_caper.html
http://playfullearning.net/2012/06/six-ways-to-clean-a-penny-a-simple-science-experiment/
https://chemistry.stackexchange.com/questions/2765/why-is-salt-needed-when-using-vinegar-to-clean-pennies
http://cleaning.lovetoknow.com/Penny_Cleaning_Science
http://applenetwork.us/experiments/VinegarPennies.html
https://water.usgs.gov/edu/ph.html

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