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1)Ce concentratie va avea solutia obtinuta prin dizolvarea a 245 g acid sulfuric in 255 g apa?
2)Cat acid azotic si cata apa se gasesc in 120g solutie de concentratie 6,3%?


Răspuns :

(1)Md=245 Mapa=255 C=? Ms=Mapa+Md=500=>C=245*100/500=49g (2) Ms=120 C2=6.3 Md=? Mapa=? Md=Ms*C2/100=120*6.3/100=7.56g Mapa=Ms-Md=120-7.56=112.44g