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Fe+2HCl->FeCl2+H2
0,6--------------------0,6
H2+CuO-to>Cu+H2O
0,6--------------0,6
n Fe=0,6 mol
=>VH2=0,6.22,4=13,44l
=>m Cu=0,6.64=38,4g
\(n_{Fe}=\dfrac{33,6}{56}=0,6mol\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,6 1,2 0,6 0,6
\(V_{H_2}=0,6\cdot22,4=13,44l\)
\(CuO+H_2\rightarrow Cu+H_2O\)
0,6 0,6 0,6
\(m_{Cu}=0,6\cdot64=38,4g\)
a) nFe= 5,6/56=0,1(mol)
nHCl=10,95/36,5=0,3(mol)
PTHH: Fe + 2 HCl -> FeCl2 + H2
Ta có: 0,3/2 > 0,1/1
=> HCl dư, Fe hết, tính theo nFe
-> nH2=nFeCl2=nFe=0,1(mol)
=> V(H2,đktc)=0,1.22,4=2,24(l)
mFeCl2=0,1.127=12,7(g)
\(n_{Fe}=\dfrac{5.6}{56}=0.1\left(mol\right)\)
\(n_{HCl}=\dfrac{10.95}{36.5}=0.3\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
Lập tỉ lệ :
\(\dfrac{0.2}{1}>\dfrac{0.3}{2}\Rightarrow Fedư\)
Khi đó :
\(n_{FeCl_2}=n_{H_2}=\dfrac{1}{2}\cdot n_{HCl}=\dfrac{1}{2}\cdot0.3=0.15\left(mol\right)\)
\(m_{FeCl_2}=0.15\cdot127=19.05\left(g\right)\)
\(V_{H_2}=0.15\cdot22.4=3.36\left(l\right)\)
\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\\ n_{HCl}=\dfrac{10,95}{36,5}=0,3\left(mol\right)\\ PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\\ Vì:\dfrac{0,1}{1}< \dfrac{0,3}{2}\\ \Rightarrow HCldư\\ \Rightarrow n_{FeCl_2}=n_{Fe}=n_{H_2}=0,1\left(mol\right)\\ \Rightarrow m_{FeCl_2}=127.0,1=12,7\left(g\right)\\ V_{H_2\left(đktc\right)}=0,1.22,4=2,24\left(l\right)\)
a)
$Fe + 2HCl \to FeCl_2 + H_2$
$n_{Fe} = n_{H_2} = \dfrac{3,36}{22,4} = 0,15(mol)$
$m_{Fe} = 0,15.56 = 8,4(gam)$
b) $n_{HCl} = 2n_{H_2} = 0,3(mol)$
$\Rightarrow m_{HCl} = 0,3.36,5 = 10,95(gam)$
c)
Cách 1 : $n_{FeCl_2} = n_{H_2} = 0,15(mol) \Rightarrow m_{FeCl_2} = 0,15.127 = 19,05(gam)$
Cách 2 : Bảo toàn khối lượng, $m_{FeCl_2} = 8,4 + 10,95 - 0,15.2 = 19,05(gam)$
a) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
0,15<--0,3<-----0,15<--0,15
=> \(m_{Fe}=0,15.56=8,4\left(g\right)\)
=> \(m_{HCl}=0,3.36,5=10,95\left(g\right)\)
b) \(m_{FeCl_2}=0,15.127=19,05\left(g\right)\)
\(n_{H_2}=\dfrac{6,72}{22,4}=0,3mol\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,3 0,6 0,3 ( mol )
\(m_{Fe\left(pứ\right)}=0,3.56=16,8g\)
\(m_{Fe\left(dư\right)}=28-16,8=11,2g\)
\(m_{HCl}=0,6.36,5=21,9g\)
\(n_{HCl}=\dfrac{14,6}{36,5}=0,4\left(mol\right)\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{Fe}=n_{H_2}=n_{FeCl_2}=\dfrac{n_{HCl}}{2}=0,2\left(mol\right)\\ a,m_{Fe}=0,2.56=11,2\left(g\right)\\ b,m_{FeCl_2}=0,2.127=25,4\left(g\right)\\ V_{H_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\)
a) \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
0,15<-0,3<--------------0,15
=> \(m_{Fe}=0,15.56=8,4\left(g\right)\)
b) \(m_{HCl}=0,3.36,5=10,95\left(g\right)\)
\(PTHH:Fe+2HCl->FeCl_2+H_2\)
0,15<--0,3<------0,15<-----0,15 (mol)
\(n_{H_2\left(dktc\right)}=\dfrac{V}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
\(m_{Fe}=n\cdot M=0,15\cdot56=8,4\left(g\right)\)
\(m_{FeCl_2}=n\cdot M=0,15\cdot\left(56+71\right)=19,05\left(g\right)\)
PTPU: Fe + 2HCl ----> FeCl2 + H2
nH2= V / 22,4 = 3,36 / 22,4 = 0,15 mol
nFe = nH2 = 0,15 mol
=> mFe = n . M = 0,15 . 56 = 8,4g
nHCl = 2nH2 = 0,3 mol
=> nHCl = n . M = 0,3 . 36,5 = 10,95g