without posting all the lab data Im just wondering if this makes sense. I calculated moles Chlorine to moles Copper as 2:1. (seems reasonable to me).
Then I calculated mole ratio of water to Copper in hydrated sample as 20:1. (not sure if this is "reasonable " or not because this is first time Ive done hydrate experiment)
so hydrated fomula would be CuCl_2*20H_2O
Thanks for any help