Is dehydration and hydration of CobalrII Chloride reversible?

Answer 1

Yes, the dehydration and hydration of cobalt(II) chloride is a reversible reaction. When cobalt(II) chloride is heated, it loses water molecules and forms an anhydrous form, which is a blue solid. Upon exposure to moisture or water, it can rehydrate and revert back to its hydrated form, which is typically pink. This property makes cobalt(II) chloride useful as a moisture indicator.