Question

Se amesteca 40g solutie de concentratie 10% cu 50g de concentratie 30%. Ce concentratie procentuala va avea solutia obtinuta?

Answer 1

ms1=40g
c1=10
md1=4
ms2=50g
c2=30
md2=15
ms final=ms1+ms2
ms final=90
md final=md1+md2
md final=25
c final=md final/ms final*100
c final=27,77

Answer 2

C1=40g C2=10% Ms=50g Md=30% C=? C1=md1/ms1.100<=>md1=C.ms1/100 C2=md2/ms2.100<=>md2=C2.ms2/100 Dar md1=md2 C1.ms1/100=C2.md2/100<=>C2.md2<=>C1.ms1=2.C1.md.2<=>ms1=2.ms2<=>ms2=md1/2=40/2 Ms=20g Mapa=ms1-ms2=20+50-10-30=30g