a)Fe +2HCl---->FeCl2 +H2(1)
x-------2x------------x----------x
Zn +2HCl---->ZnCl2 +H2(2)
y---------2y-------y-----------y
n\(_{H2}=\frac{4,48}{22,4}=0,2\left(mol\right)\)
Theo bài ra ta có
\(\left\{{}\begin{matrix}56x+65y=12,1\\x+y=0,2\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,1\\y=0,1\end{matrix}\right.\)
%m\(_{Fe}=\frac{0,1.56}{12,1}.100\%=46,28\%\)
%m\(_{Zn}=100-46,28=53,72\%\)
b)Theo pthh
n\(_{HCl}=2n_{H2}=0,4\left(mol\right)\)
m\(_{HCl}=0,4.36,5=14,6\left(g\right)\)
c) Theo pthh1
n\(_{FeCl2}=n_{Fe}=0,1\left(mol\right)\)
m\(_{FeCl2}=0,1.127=12,7\left(g\right)\)
Theo pthh2
n\(_{ZnCl2}=n_{Zn}=0,1\left(mol\right)\)
m\(_{ZnCl2}=0,1.136=13,6\left(g\right)\)
d)Tự lm nhé
n H2 = 0,2 (mol)
Gọi x, y là số ml của Fe , Zn
PTHH : Fe + 2HCl --->FeCl2 +H2
.................x.......2x
Zn +2HCl--->ZnCl2+H2
y........2y
\(\Rightarrow\left\{{}\begin{matrix}56x+65y=12,1\\2x+2y=0,2\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,1\\y=0,1\end{matrix}\right.\)
\(\Rightarrow\%Fe=46,28\%\Rightarrow\%Zn=100-46,28\%=53,72\%\)
b,\(nHCl=0,4\left(mol\right)\Rightarrow mHCl=0,4.36,5=14,6\)