Vs = 100 cm3 = 0,1 L, Cm = 0,5 mol/L
stim ca Cm = niu/Vs
=> niu = CmxVs = 0,5x0,1 = 0,05 moli HCl
miu.HCl = 36,5 g/mol
md.HCl = miuxniu
= 0,05x36,5 = 1,825 g HCl
stim ca c% = mdx100/ms
=> ms = mdx100/c%
= 1,825x100/36,5 = 5 g sol. HCl
ro = ms/Vs
=> Vs = ms/ro
= 5/1,18 = 4,24 cm3 sol. HCl