Episode

How do diapers change color when wet?

Podcast: Chemistry For Your Life
Published: Apr 9, 2026
Duration seconds: 3034
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Summary

You’ve seen it a hundred times… but how does it actually work? Why do diapers change color when they’re wet? What kind of chemistry is happening in there? And how does something as simple as pee trigger such a dramatic color shift? Let’s talk acids, bases, color, and one surprisingly deep piece of everyday science.