\(Fe+2HCl\rightarrow FeCl_2+H_2\)
x_____2x______x
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
y ___2y_______y
Đổi 500ml=0,5l
\(n_{HCl}=0,5.1=0,5\left(mol\right)\)
\(\left\{{}\begin{matrix}2x+y=0,5\\127x+136y=33,55\end{matrix}\right.\rightarrow\left\{{}\begin{matrix}x=0,05\\y=0,2\end{matrix}\right.\)
\(\%m_{Fe}=\frac{00,05.56}{0,05.56+0,2.65}.100\%=17,72\%\)
\(\%m_{Zn}=100\%017,72\%=82,28\%\)