COATINGS 3of3 Easy And Inexpensive Copper Plating Trick!

Orig title: Easy And Inexpensive Copper Plating Trick!
Dude never did give the update on the formula for the root killer.
My root killer has no formula: Copper sulfate pentahydrate 99%.
Metalic copper equivalent 25.1%.

Got a bag of Cupric sulfate i'm hoping to kill roots w/:
Sulfur 12 1/2%
Copper 25.2%
Iron 250ppm
Lead 30ppm
Arsenic 10ppm
Crap! Wish i could go by formula... Copper sulfate on the net: CuSO4. Easy!