Fe+2HCl->FeCl2+H2
0,02-0,04--------------0,02
Fe2O3+6HCl->2Fecl3+3H2O
0,03-----0,18 mol
n H2=\(\dfrac{0,448}{22,4}\)=0,02 mol
=>m Fe=0,02.56=1,12g
=>m Fe2O3=4,8g=>n Fe2O3=\(\dfrac{4,8}{160}\)=0,03 mol
=>x=CMHCl=\(\dfrac{0,22}{0,5}\)=0,44M
b)
2Fe+3Cl2-to>2FeCl3
0,02---0,03
=>m Cl2=0,03.71=2,13g