CoCl2 is a compound that is blue when it is dehydrated and pink when in its hydrated form. I have seen a solution of CoCl2 used to paint a coloring book type figure (on paper). This is hung outside and gives a blue color when the air is dry and pink color when the air is humid.
Is it possible to use the appearance of hydrates to determine if there is moisture in the room? Explain.
I answered this question last night. If not for you, please let me know and I can redo it or direct you to the original answer. In short, the answer is yes.
It was not me who asked this question last night?
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