Magic Painting with Acids and Bases
I've been "on the road" training a bit again this week. On Monday night I presented on Life Science and Life Cycles here in Marquettte. Wednesday, I presented a variety of simple science experiences in Menominee. One of the many things we ran out of time before we were able to finish was testing for acids and bases with a red cabbage indicator. So, yesterday, I whipped up a batch of indicator paper with some of the cabbage.
You want to watch the paper to make sure that it gets fully saturated, but at the same time, you don't want to over do it so that the paper rips when you remove it. This is a process that you could easily involve the children in. However, I wanted to make this paper a surprise for my little ones, so I did this while they were napping ;).
To see the "magic" work, I gave each child a piece of white card stock for under their filters. (On our wooden table, it is hard to see the colors!). They were pleasantly surprised to see that the lemon juice did not produce a yellow paint, but a bright pink one, and the cloudy water turned green on the paper!!! How did that happen? It had to be magic! The vinegar also turned pink, but was slightly lighter than the lemon juice.
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