The maximum solubility of MgSO4 at 25 degree C is 39.893g/100mL. I need to use MgSO4.7H2O. How to determine the amount and solvent that I need to produce the maximum solubility of 39.893g/100mL?
To convert g MgSO4 to g MgSO4.7H2O you do the same as I showed you a couple of days ago when you wanted 5 g MgSO4 but wanted to use MgSO4.7H2O.
mm = molar mass
39.893 g MgSO4 x (mm MgSO4.7H2O/mm MgSO4) = ?
For the volume of solvent you need the density of the solution.