This FREE science demo is perfect to use on Valentine's Day because let's face it, who doesn't love a secret message?!
This Secret Message demo shows indicators react in the presence of acids or bases. In this case, phenolphthalein is used to reveal “secret messages” that have been written using a basic solution. Demo set-up is easy and quick with long-lasting results!
Students do NOT need to have knowledge of indicators to be "wowed" by this demonstration.
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