nH2 = 4.48/22.4 = 0.2 (mol)
Đặt :
nFe = a (mol)
nZn = b (mol)
=> 56a + 65b = 12.1 (1)
Fe + 2HCl => FeCl2 + H2
Zn + 2HCl => ZnCl2 + H2
nH2 = a + b = 0.2 (2)
(1) , (2) :
a = b = 0.1
mFe = 0.1*56 = 5.6 (g)
mZn = 6.5 (g)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
Giả sử: \(\left\{{}\begin{matrix}n_{Fe}=x\left(mol\right)\\n_{Zn}=y\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow56x+65y=12,1\left(1\right)\)
Ta có: \(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{Fe}+n_{Zn}=x+y\left(mol\right)\)
⇒ x + y = 0,2 (2)
Từ (1) và (2) ⇒ x = y = 0,1 (mol)
\(\Rightarrow\left\{{}\begin{matrix}m_{Fe}=0,1.56=5,6\left(g\right)\\m_{Zn}=0,1.65=6,5\left(g\right)\end{matrix}\right.\)
Bạn tham khảo nhé!
