Question

Se evapora 100 ml apa din 300 g solutie de zahar de concentratie 30%.Care va fi concentratia solutiei obtinute?

Answer 1

100 ml apa=100 g apa

md=30%×300=90 g zahar pur

ms initial=300 g

ms final=300-100=200 g

c%=(100×90)/200=45%