Đặt \(\left\{{}\begin{matrix}n_{Al}=x\\n_{Mg}=y\end{matrix}\right.\) ( mol ) \(\rightarrow m_{hh}=27x+24y=12,6\left(g\right)\) (1)
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
x 3x 1,5x ( mol )
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
y 2y y ( mol )
\(n_{H_2}=1,5x+y=\dfrac{13,44}{22,4}=0,6\left(mol\right)\) (2)
\(\left(1\right);\left(2\right)\Rightarrow\left\{{}\begin{matrix}x=0,2\\y=0,3\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\%m_{Al}=\dfrac{0,2.27}{12,6}.100=42,85\%\\\%m_{Mg}=100-42,85=57,15\%\end{matrix}\right.\)
\(n_{HCl}=3.0,2+2.0,3=1,2\left(mol\right)\)
\(m_{HCl}=1,2.36,5=43,8\left(g\right)\)
