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Can ketchup clean a penny?

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Have you every noticed that some pennies are shiny, but some are dirty? Let's learn why some pennies get dirty AND how we can clean a penny in this video!

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TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

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Additional Resources for you to Explore
Some acids are safe to eat, like lemons or ketchup, but did you know that some acids can be really dangerous? Learn more about acids in this article and then listen along to this video to find out what makes an acid safe or dangerous.Did you try this experiment at home? Do you want to try some other experiments? Use what you now know about acids to try this experiment at home and see if you can guess what will happen!
Understanding acids can be important in our everyday life. Knowing what materials react with each other can help us in cooking or cleaning, not just science experiments!

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Create and share a new lesson based on this one.

About TED-Ed Best of Web

TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

Meet The Creators