Gọi \(\left\{{}\begin{matrix}n_{Al}:x\left(mol\right)\\n_{Zn}:y\left(mol\right)\end{matrix}\right.\)
PTHH:
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
x______3x________x______1,5x_(mol)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
y____2y_________y_______y_(mol)
Giải hệ PT:
\(\left\{{}\begin{matrix}1,5x+y=0,07\\27x+65y=3,14\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,02\\y=0,04\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}\%m_{Al}=\frac{0,02.27}{3,14}.100\%=17,2\%\\\%m_{Zn}=100\%-17,2\%=82,8\%\end{matrix}\right.\)
\(KOH+HCl\rightarrow KCl+H_2O\)
\(n_{KOH}=0,2.0,2=0,04\left(mol\right)\)
\(\Rightarrow n_{HCl}=0,18\left(mol\right)\)
\(\Rightarrow V_{HCl}=\frac{0,18}{0,15}=1,2\left(l\right)\)
