\(n_{HCl}=0,4.2=0,8\left(mol\right)\\ Đặt:n_{CuO}=a\left(mol\right);n_{Fe_2O_3}=b\left(mol\right)\left(a,b>0\right)\\CuO+2HCl\rightarrow CuCl_2+H_2O\\ Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O \\ \Rightarrow\left\{{}\begin{matrix}80a+160b=24\\2a+6b=0,8\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0,1\\b=0,1\end{matrix}\right.\\ C1:m_{muối}=135a+2.162,5b=135.0,1+325.0,1=46\left(g\right)\\ C2:n_{H_2O}=\dfrac{n_{HCl}}{2}=0,4\left(mol\right)=n_{O\left(trongH_2O\right)}=n_{O\left(trong.oxit\right)}\\ \Rightarrow m_{muối}=m_{CuO,Fe_2O_3}-m_{O\left(trong.oxit\right)}+m_{Cl^-}=24-0,4.16+0,8.35,5=46\left(g\right)\\ b,m_{CuO}=80a=8\left(g\right);m_{Fe_2O_3}=160b=16\left(g\right)\)
Làm vài bài rồi ra sân bay check in đây
CuO+2HCl->CuCl2+H2O
x--------2x
Fe2O3+6HCl->2FeCl3+3H2O
y--------------6y
Ta có :
\(\left\{{}\begin{matrix}56x+160y=24\\2x+6y=0,8\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}x=0,1\\y=0,1\end{matrix}\right.\)
=>m CuO=0,1.56=5,6g
=>m Fe2O3=0,1.160=16g
-> m muối =0,1.135+0,2.162,5=46g
C2:n H2O=0,4 mol
=>m muối =24-0,4.16+0,8.35,5=46g
