Yes, it does
copper sulfate, cupric sulfate, cupric sulphate.l
Cupric or copper II sulfate is CuSO4
CuSO4 + H20
no but it can irritate skin and in exess can damage hair
If you were to add water to anhydrous cupric sulfate it would be pentahydrate a bright blue.
powders have larger surface areas so will dissolve faster
Cupric sulfate and chloride are blue; also cupric carbonate is blue but not soluble in water.
It is not.
Yes it is