Make a pH Rainbow Wand
(About.com) Here's an easy and colorful chemistry demonstration for you. Take a long glass tube and fill it with Universal Indicator solution. Add a few drops of 0.02M HCl to one end of the tube and seal it with a stopper. Add a couple of drops of 0.02M NaOH to
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updated 981 (Chemistry), inserted 10, updated 0, at 2012-05-28 05:24:36
