(ro) p = 1,31 g/cm3 , Vs = 200 cm3 si p = ms/Vs
=> ms1 = pxVs = 200x1,31 = 262 g sol
stim ca c = mdx100/ms
=> md1 = ms1xc1/100 = 262x28/100 = 73,36 g
ms2 = mdx100/c2 = 73,36x100/50 = 146,72 g sol finala
p.final = 1,54 g/cm3
=> Vs.final = ms2/p.final = 95,27 cm3