in chemical catalogs, salts are often sold in hydrated and non-hydrated versions. Like sodium sulfate anhydrous and sodium sulfate decahydrate. I tried dissolving the anhydrous and it didn't dissolve very easily, instead it clumped. I'm wondering if I would have had easier dissolving with the hydrated form, but I don't have it to check. Is it often the case that easier dissolving occurs with the hydrated salts with water complexed to the ion?