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![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{Fe}=\dfrac{28}{56}=0,5mol\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,5 1 0,5
\(V_{H_2}=0,5\cdot22,4=11,2l\)
\(m_{HCl}=1\cdot36,5=36,5g\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Fe + 2HCl -> FeCl2 + H2
nFe = 5,6/56 = 0,1 mol
=>nH2 = 0,1 mol
=> VH2= 0,1*22,4= 2,24 lít
\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
PTHH: Fe + 2HCl ---> FeCl2 + H2
0,1-->0,2------------------>0,1
=> \(\left\{{}\begin{matrix}m_{ddHCl}=\dfrac{0,2.36,5}{15\%}=\dfrac{146}{3}\left(g\right)\\V_{H_2}=0,1.22,4=4,48\left(l\right)\end{matrix}\right.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\\ n_{H_2}=n_{Fe}=0,25\left(mol\right)\\ V_{H_2}=0,25.22,4=5,6\left(l\right)\\ n_{HCl}=2n_{Fe}=0,5\left(mol\right)\\ m_{HCl}=0,5.36,5=18,25\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) PTPU
Theo pt: nH2 = nFe = 0,05 (mol)
VH2 = 22,4.n = 22,4.0,05 = 1,12 (l)
b) nHCl = 2.nFe = 2. 0,05 = 0,1 (mol)
mHCl = M.n = 0,1.36,5 = 3,65 (g)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{Fe}=\dfrac{m}{M}=\dfrac{28}{56}=0,5\left(mol\right)\\ PTHH:Fe+2HCl->FeCl_2+H_2\)
ti le 1 : 2 : 1 : 1
n(mol) 0,5-->1--------->0,5------>0,5
\(m_{FeCl_2}=n\cdot M=0,5\cdot\left(56+35,5\cdot2\right)=63,5\left(g\right)\\ V_{H_2\left(dktc\right)}=n\cdot22,4=0,5\cdot22,4=11,2\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
\(n_{Fe} = \dfrac{14}{56} = 0,25(mol)\)
Phương trình hóa học : \(Fe + H_2SO_4 \to FeSO_4 + H_2\)
Theo PTHH : \(n_{H_2} = n_{Fe} = 0,25(mol)\\ \Rightarrow V_{H_2} = 0,25.22,4 = 5,6(lít)\)
b)
Có : \(n_{H_2SO_4} = n_{H_2} = 0,25(mol)\\ \Rightarrow m_{H_2SO_4} = 0,25.98 = 24,5(gam)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
PT: \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
Ta có: \(n_{Fe}=\dfrac{14}{56}=0,25\left(mol\right)\)
Theo PT: \(n_{H_2}=n_{H_2SO_4}=n_{Fe}=0,25\left(mol\right)\)
a, \(V_{H_2}=0,25.22,4=5,6\left(l\right)\)
b, \(m_{H_2SO_4}=0,25.98=24,5\left(g\right)\)
Bạn tham khảo nhé!
nFe = \(\dfrac{14}{56}\)= 0,25 mol
Fe + H2SO4 → FeSO4 + H2
Theo pt : 1 1 1 1 mol
Theo đề bài : 0,25 0,25 0,25 0,25 mol
=> V H2 = 0,25 . 22,4 = 5,6 lít
mH2SO4 = 0,25 . 98 = 24,5 gam
nFe = 0,05 mol
PT : Fe + 2HCl -> FeCl2 + H2
......0,05......0,1...................0,05 ( mol )
V H2 = 0,05 . 22,4 = 1,12 ( l )
mHCl = 0,1 . 36,5 = 3,65 (g)