- calculez masa de HCl care se obtine din masa data de H2
1mol......1mol........2mol
H2 + Cl2 ---> 2HCl
2g........................2x36,5g
200g..................m= 7300gHCl
-calculez masa de solutie din relatia
c= mdx100/ms
5/100= 7300/ms.................................calculeaza ms !!!