-sticla mica c= 9%, ms= 500gotet
aplici formula c=mdx100/ ms ----> md=cxms/100-- md= 9x500/100=45gacid acetic
--->deci, in prima sticla exista 500g otet(solutie) in care se gasesc dizolvate 45g acid acetic
-sticla mare......................rezolva dupa modelul dat