Question

se amesteca 200g solutie de c=10% cu 600g solutie de c=20%.ce concentratie procentuala va avea solutia obtinuta dupa amestecare?

Answer 1

ms=200g

c1=10%

ms2=600g

c2=20%

c/100=md/ms

==>md1=c1*ms1/100

md1=10*200/100

md1=20g

md2=20*600/100

md2=120g

msf=ms1+ms2=800g

mdf=md1+md2=140g

cf=140*100/800

cf=17,5%