nAl=\(\dfrac{m}{M}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
pthh: 2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2
0,2... ... .... ..0,6 ... ... ...0,2 ... ...0,3 (mol)
\(\Rightarrow\) CM ddHCl=a=\(\dfrac{n}{V}=\dfrac{0,6}{0,5}=1,2\left(M\right)\)
(ở đây chắc b là V)
VH2=b=n.22,4=0,3.22,4=6,72(l)
mAlCl3=n.M=0,2.133,5=26,7(g)
Ta có nAl = \(\dfrac{5,4}{27}\) = 0,2 ( mol )
2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2
0,2.........0,6.........0,2.........0,3
=> VH2 = 0,3 . 22,4 = 6,72 ( mol )
=> CM HCl = n : V = 0,6 : 0,5 = 1,2 M
=> mAlCl3 = 133,5 . 0,2 = 26,7 ( gam )