Mcristalohidrat(CuSO4×5H2O) = 250g/mol
m cristalohidrat = 0,5×250 = 125g
250g crist.......160g CuSO4......90g H2O
125g...................80g.....................45g
ms initial = 80+45 = 125g
m H2O initial = 45g
Cf = md/msi+m×100
16 = 80/125+m×100
16m = 6000 => m = 375g apa
