2Al + 6HCl \(\rightarrow\)2AlCl3 + 3H2 (1)
nAl=\(\dfrac{5,4}{27}=0,2\left(mol\right)\)
nHCl=0,5.1,4=0,7(mol)
Vì \(\dfrac{0,2.3}{1}< \dfrac{0,7}{1}\)nên HCl dư 0,7-0,6=0,1(mol) còn Al hết
theo PTHH ta có:
nAl=nAlCl3=0,2(mol)
CM dd AlCl3=\(\dfrac{0,2}{0,5}=0,4M\)
CM dd HCl=\(\dfrac{0,1}{0,5}=0,2M\)