Question

Determinati concentratia procentuala a unei solutii obtinute prin amestecarea a 75 g solutie de concentratie 15% cu 60g solutie de concentrație 20% si cu 124g soluție de concentrație 14%

Answer 1

ms1=75g
c1=15%
ms2=60g
c2=20%
ms3=124g
c3=14%
c1=md1/ms1•100=ms1•c1/100=75•15/100=1125 g(md1)
c2=md2/ms2•100=ms2•c2/100=60•20/100=12 g (md2)
c3= md3/ms3•100=ms3•c3/100=124•14/100=1736/100=17,36 g (md3)
cf=md1+md2+md3/ms1+ms2+ms3•100=1125+12+17,36/75+60+124=1154,36/259=4,45%
Cf=4,45%