Datele problemei:
msol1 = 200g, c1 = 40%
mH2O adaugat = 100g
c2 = ?
md este constant!!
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c1 = md*100/msol1 => md = c1*msol1/100 = 40*200/100 = 80g
c2 = md*100/msol2 = md*100/(msol1+mH2O adaugat) = 80*100/(200+100)=8000/300 = 26,67%
Concentratia solutiei a scazut.