A laboratory procedure calls for 250.0 mL of 0.1000 M aqueous CuSO4.
Solid copper(II) sulfate is supplied as the pentahydrate, CuSO4⋅5H2O. Under humid conditions it can further absorb water to form CuSO4⋅7H2O.
(a) Determine the minimum mass of CuSO4⋅5H2O that must be weighed to prepare 250.0 mL of 0.1000 M CuSO4 solution.
(b) If the hydrate has unintentionally absorbed additional water so that the solid is now CuSO4⋅7H2O, calculate the mass of this new hydrate that must be weighed to deliver the same number of moles of CuSO4 required in part (a).