Determine the mass of CuSO4 • 5H2O needed to prepare 100.00 mL of 0.65000 M copper sulfate solution.

Answer 1

From this post I assume you want to prepare CuSO4 solution and not CuSO4.5H2O.
How many mols CuSO4 do you need? That's M x L = 0.65000 x 0.100 = 0.06500
grams CuSO4 = mols x molar mass CuSO4 = ?
But you want to weigh CuSO4.5H2O so how do you handle that?
Use the mass shown by ? x (molar mass CuSO4.5H2O/molar mass CuSO4) = this you weigh out, place it in a 100 mL volumetric flask, add a a little distilled water, swirl until all of the CuSO4.5H2O is dissolve, then add distilled to the mark on the volumetric flask, stopper, mix thoroughly, label. Done.

Answer 2

Would it be 16.229g?

Answer 3

That looks good to me.