maseni odnos

Ana100's picture

U kom masenom odnosu treba pomijesati 25% i 50% rastvor da bi se dobio 30% rastvor.Molim vas da mi objasnite postupak resavnja ovog zadatka.Unapred hvala

milicaradenkovic's picture

mr1*0.25+mr2*0.5=30

mr1+mr2=100

mr2=100-mr1

0.25*mr1+0.5*(100-mr1)=30

50-30=0.25*mr1

mr1=20/0.25=80 g 25%

mr2=100-80=20 g 50%

mr1:mr2=80:20/:20

mr1:mr2=4:1