a/
Fe2O3 + 6HCl -> 2FeCl3 + 3H2O (1)
CuO + 2HCl -> CuCl2 + H2O (2)
a/
Fe2O3 + 6HCl -> 2FeCl3 + 3H2O (1)
CuO + 2HCl -> CuCl2 + H2O (2)
b/ Gọi x,y(mol) là số mol CuO và Fe2O3. ĐK: x,y>0
Fe2O3 + 6HCl -> 2FeCl3 + 3H2O (1)
...x..............6x.........................................(mol)
CuO + 2HCl -> CuCl2 + H2O (2)
.y............2y..........................................(mol)
K/l HCl:
............mHCl=200.25,55%=51,1(g)
Ta có hpt:\(\left\{{}\begin{matrix}80x+160y=40\\6x+2y=1,4\end{matrix}\right.\)\(\Leftrightarrow\left\{{}\begin{matrix}x=0,16\\y=0,18\end{matrix}\right.\)(TM)
K/l CuO:
............m=0,16.80=12,8(g)
K/l Fe2O3:
...............m=0,18.160=28,8(g)
\(n_{CuO}=x;n_{Fe_2O_3}=y\\ m_{HCl}=\frac{200.25,55}{100}=51,1\left(g\right)\rightarrow n_{HCl}=\frac{51,1}{36,5}=1,4\left(mol\right)\\ PTHH:CuO+2HCl\rightarrow CuCl_2+H_2O\\ PTHH:Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\\ hpt:\left\{{}\begin{matrix}2x+6y=1,4\\80x+160y=40\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,1\\y=0,2\end{matrix}\right.\Rightarrow n_{CuO}=0,1\left(mol\right)\rightarrow m_{CuO}=80.0,1=8\left(g\right)\\ \Rightarrow n_{Fe_2O_3}=160.0,2=32\left(g\right)\)
Lộn mất tiêu phần hptxD:
pt(2) đúng: 2x+6y=1,4
=>x=0,1; y=0,2(TM)
=> mCuO=8(g); mFe2O3=32(g)
a) CuO + 2HCl → CuCl2 + H2O (1)
Fe2O3 + 6HCl → 2FeCl3 + 3H2O (2)
b) \(m_{HCl}=200\times25,55\%=51,1\left(g\right)\)
\(\Rightarrow n_{HCl}=\frac{51,1}{36,5}=1,4\left(mol\right)\)
Gọi x,y lần lượt là số của CuO và Fe2O3
Ta có: \(\left\{{}\begin{matrix}80x+160y=40\\2x+6y=1,4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,1\\y=0,2\end{matrix}\right.\)
Vậy \(n_{CuO}=0,1\left(mol\right)\Rightarrow m_{CuO}=0,1\times80=8\left(g\right)\)
\(n_{Fe_2O_3}=0,2\times160=32\left(g\right)\)