c/100= md/ms
Cand din doua solutii se obtine a treia.
c3/100= (md1+md2)/(ms1+ms2)
-calculez md1:37,2/100= md1/500---> md1= 186kg acid
-calculez md2:ms2= roxV---> ms2= 1,02kg/l x 400l= 424kg
12/100= md2/424--> md2=50,88kg
c3/100= (md1+md2)/(ms1+ms2)
c3=(186+50,88)x100/(500+424)........................calculeaza !!!
Vf=V3= V1+V2= 500/1,19+ 400 .....................CALCULEAZA ,litri
ro= (md1+md2)/Vf......INLOCUIESTE SI CALCULEAZA
