Question

ce cantitati de H2SO4 si H2O sunt necesare pentru a obtine 600 g solutie de concentratie 30% .

Answer 1

c=100md/ms

=>md=cms/100=m H2SO4 =30*600/100=180g

m apa=ms-md=420g

Answer 2

ms=600g                                                                                                                                                               c=md.100:ms                                                                                                                  md=c.ms:100
md=?                                  md=30.600:100
mapa=?                              md=180 g H2SO4                                                                c=30                                           ms=md +mapa                                                                                                                mapa=ms-md                                          
                                            mapa=600-180=420g