Question

Intr-o solutie de Nacl cu m 1332 g raportul molar NaCl : H2O =1:6 . calculati m NaCl dizolvata in solutie exprimata in grame si concentratia procentuala a solutiei de NaCl

Answer 1

c/100= md/ms,     unde   ms= md+m,apa
md/ m,apa=1/6--> m,apa= 6md
                                        ms= md+6md 
                                     1332= 7md---> md= 190,3g NaCl
c=190,3x100/1332---------------------> calculeaza !!!!!