Question

Cata apa trebuie evaporata pentru a concentra 100g dr solutie cu concentratia 27% pana la 50%?

Answer 1

Cp=md/ms*100==>md=100*27/100=27g <br /><br />ms=md+mH2O==>mH2O=ms-md=100-27=73g <br /><br />50=27/mH2O+27*100==>50(27+mH2O)=2700==>1350+50mH2O=2700==>50mH2O=1350==>mH2O=27g<br /><br /> mH2O evaporat=73-27=46g ..