Răspuns:
Explicație:
ms HCl =300g
c= 50%
masa Fe=?
-se afla md sol. de HCl
md=c .ms :100
md=50.300:100=150g HCl
xg 150g
Fe + 2H Cl =FeCl2 +H2
56g 2.36,5g
x=56 .150 : 73=115,07 g Fe
n =115,07g : 56g/moli=2,05 moli Fe
MHCl= 1 + 35,5=36,5------->36,5g/moli