Scriem datele problemei:
ms1=200g
c1=90%
ms=600g
C2=30%
ms=30pg
c=45%
cf=?
Formula de calcul al concentrației procentuale:
c=md/ms*100
c1=md1/ms1*100
90=md1/200*100=)90/100=md1/200=)md1=90*200/100=)md1=180g
c2=md2/ms2*100
30=md2/600*100=)30/100=md2/600=)md2=30*600/100=)md2=180g
c3=md3/ms3*100
45=md3/300*100=)40/100=md3/300=)md3=40*600/100=)md3=240g
mdf=md1+md2+md3
msf=ms1+ms2+ms3
cf=md1+md2+md3/ms1+ms2+ms3*100
cf=180+180+240/200+600+300*100=)cf=600/1100*100=)cf=54,54%
