md = 3 g , m.apa = 100 g
ms = md + m.apa = 103 g
stim ca:
c% = mdx100/ms
Cm = md/miuxVs
Cmm = niu / 1000 g solvent
=> c% = 3x100/103 = 2,91%
pentru Cm consideram ca ro solutie formata are 1 g/cm3
Cm = 3/98x0,1 = 0,3 M
pt. Cmm aplicam regula de trei simpla:
daca la 100 g solvent ...........n moli H2SO4
la 1000 g ..................................... Cmm
unde n = nr moli = masa/miu = 3/98 = 0,03 moli H2SO4
=> Cmm = 0,03x1000/100 = 0,3 molali
