Gọi số mol Al là x; Fe là y \(\Rightarrow27x+56y=19,3\)
Phản ứng xảy ra:
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
Ta có :
\(3n_{Al}+2n_{Fe}=3x+2y=n_{HCl}+2n_{H2SO4}\)
\(=0,4+0,45.2=1,3\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}x=0,3\\y=0,2\end{matrix}\right.\)
\(\Rightarrow m_{Al}=0,3.27=8,1\left(g\right);m_{Fe}=0,2.56=11,2\left(g\right)\)