2Al+6Hcl->2AlCl3+3H2
x-----------------x--------3\2x
Fe+2HCl->FeCl2+H2
y-----------------y------y
Ta có :
\(\left\{{}\begin{matrix}27x+56y=9,65\\\dfrac{3}{2}x+y=0,325\end{matrix}\right.\)
=>x=0,15 mol, y=0,1 mol
=>m Al=0,15.27=4,05g
=>m Fe=56.0,1=5,6g
b)
=>m AlCl3=0,15.133,5=20,025g
=>m FeCl2=0,1.127=12,7g
\(\left\{{}\begin{matrix}Al\\Fe\end{matrix}\right.+HCl->\left\{{}\begin{matrix}AlCl3\\FeCl2\end{matrix}\right.+7,28lH2\)
a,
Ta có :
\(\left\{{}\begin{matrix}27x+56y=9,65\\3x+2y=0,65\left(bt-e\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}x=0,15\left(mol\right)\\y=0,1\left(mol\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}mAl=0,15.27=4,05\left(g\right)\\mFe=0,1.56=5,6\left(g\right)\end{matrix}\right.\)
b,
Bảo toàn nguyên tố :
nAl = nAlCl3 = 0,15 ( mol )
nFe = nFeCl2 = 0,1 ( mol )
Khối lượng chất tan A :
m = 0,15 . 133,5 + 0,1 . 127 = 32,725(g)