a, \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
b, Ta có: 27nAl + 56nFe = 9,65 (1)
Theo PT: \(n_{HCl}=3n_{Al}+2n_{Fe}=0,325.2=0,65\left(mol\right)\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{Al}=0,15\left(mol\right)\\n_{Fe}=0,1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{Al}=0,15.27=4,05\left(g\right)\\m_{Fe}=0,1.56=5,6\left(g\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\%m_{Al}=\dfrac{4,05}{9,65}.100\%\approx41,97\%\\\%m_{Fe}\approx58,03\%\end{matrix}\right.\)