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Definition of chemical reaction
Started over 6 years ago by Patricia Dwyer-Hallquist.
Sorry I couldn't pick a category that quite fits. My question has to do with how people view conversion of an anhydrous salt to its hydrate. An example is conversion of anhydrous cupric sulfate to cupric sulfate pentahydrate. I would argue that this is a chemical reaction because it involves formation of a new chemical substance. Anhydrous cupric sulfate and cupric sulfate pentahydrate should be considered different compounds because they have different chemical formulas, different colors, and different melting points. However, I have seen arguments that formation of the pentahydrate does not involve breaking or formation of bonds, and therefore is not a chemical reaction. I think the formation of the hydrate does involve bond formation. How do people normally teach this?