# What is the difference between copper sulfate and copper sulfate pentahydrate? [closed]

I want to do copper plating and I have seen people using copper sulfate, but also there is copper sulfate pentahydrate.
What is the difference and which one should I use for electroplating?

## closed as unclear what you're asking by Jan, bon, Todd Minehardt, ringo, Klaus-Dieter WarzechaOct 10 '16 at 5:29

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Copper (II) sulphate pentahydrate, $\ce{CuSO4.5H2O}$, indicates copper (II) sulphate in crystalline form (for ease you can say copper (II) sulphate whose crystals contain water).
Copper (II) sulphate, $\ce{CuSO4}$, indicates anhydrous copper (II) sulphate (copper sulphate which has lost its water molecules).
The difference is that $\ce{CuSO4.5H2O}$ has a blue colour due to the presence of water molecules in its structure (for same reason ferrous sulphate has a green colour), while anhydrous copper (II) sulphate, $\ce{CuSO4}$, is white.
Copper Sulfate is $\ce{CuSO4}$, 159.609 g/mol, and Copper Sulfate Pentahydrate is $\ce{CuSO4*5H2O}$, 249.685 g/mol. Either would work for copper plating.