Question:

What actually causes cobalt chloride to change color when its heated?

Answer:

The water molecules attached to the cobalt II chloride crystals evaporates. What you have after heating is anhydrous cobalt II choride (that is, cobalt II chloride minus water).

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Cobalt(II) chloride Copper(II) chloride Cobalt(II) hydroxide Cobalt(II) bromide Cobalt(II) sulfate Cobalt sulfide Humidity indicator Metal halides Cobalt Hydrate Desiccation Cobalt(II) bromide Chemistry Chlorides Dietary minerals
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