Răspuns:
pt sol finala avem:V=200ml
c=20/100
densit=1,1gcm3(1ml=1cm3)m=densxV=1,1x200=220gsol=ms
c=mdx100/ms
md=cxms/100=20x220/100=44g HCl pur
sol 1
100g ......................15g HCl
a...............................X X=15a/100
sol 2
100g................35gHcl
b..........................Y Y=35b/100
a+b =220 (ms)
X+Y =44(md)
rezolvi sistemul
Explicație: