Question

A commercial for a well known cleaning powder says that it "shakes out white, then turns blue" what type of reaction os occuring? what compound can one use to produce this effect?

Answers

DrBob222
Probably a hydration reaction in which the dry material is one color and the "wet" material is another. I think CoCl2 may do that under the right conditions but the CoCl2 hydrate I've seen is blue when dry and pink when wet.
Nairi
I just did this lab... I don't know the coumpound, but its Comet the cleaner... and it is a hydration reaction... ^_^

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