\(Fe_2O_3\left(a\right)+6HCl\left(6a\right)->2FeCl_3\left(2a\right)+3H_2O\)
\(CuO\left(b\right)+2HCl\left(2b\right)->CuCl_2\left(b\right)+H_2O\)
a) Gọi a,b lần lượt là sm của Fe2O3 , CuO
\(n_{HCl}=0,5\left(mol\right)\)
Ta có: \(\left\{{}\begin{matrix}160a+80b=16\\3a+b=0,25\end{matrix}\right.=>\left\{{}\begin{matrix}a=0,05\\b=0,1\end{matrix}\right.\)
\(\Rightarrow\%m\)
b) \(m_{FeCl_3}=0,1.162,5=16,25g\)
\(m_{CuCl_2}=13,5g\)
c) \(C\%ddFeCl_2=\dfrac{16,25}{266}.100\%=6,1\%\)
\(C\%ddCuCl_2=5\%\)