Md1=c1Xms1:100
=20x200g:100
=4000g:100
=40g
md2=c2xms2
=80x800g:100
=64000g:100
=640g
md f=40g+640g=680g
mersi f=800g+200g=1000g
cf=mdx100:mersi
=680x100:1000g
=68%
Md=masa de substanta dizolvata
mersi=masa solutie
c=concentratie
apropo vezi ca unde mi-a corectat calculatoru si scrie mersi ii de fapt masa solutie