Question

se amesteca 40 g solutie de concentratie 10% cu
40 g solutie de concentratie 30 % . Sa se determine
concentratia solutiei finale​

Answer 1

Datele problemei:
ms1=40g
c1=10%
ms2=40g
c2=30%
c3=?
Formula de calcul pt concentrație este:
c=md*100/ms
c1=md1*100/ms1
10=md1*100/40=)10/100=md1/40=)md1=40*10/100=)md1=4 g
c2=md2*100/ms2
30=md2*100/40=)30/100=md2/40=)md2=40*30/100=)md2=12 g
md3=md1+md2=)md3=4+12=)md3=16 g
ms3=ms1+ms2=)ms3=40+40=)ms3=80 g
c3=md3*100/ms3
c3=16*100/80=)c3=1600/80=)c3=20%