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$n_{Fe}=\dfrac{11,2}{56}=0,2(mol)$
$Fe+H_2SO_4\to FeSO_4+H_2\uparrow$
Theo PT: $n_{H_2SO_4}=n_{FeSO_4}=n_{H_2}=0,2(mol)$
$\Rightarrow \begin{cases} m_{H_2SO_4}=0,2.98=19,6(g)\\ m_{FeSO_4}=0,2.152=30,4(g)\\ V_{H_2}=0,2.22,4=4,48(l)\end{cases}$
\(PTHH:Fe+H_2SO_4->FeSO_4+H_2\)
0,4--->0,4-------->0,4-------->0,4 (mol)
\(n_{Fe}=\dfrac{m}{M}=\dfrac{22,4}{56}=0,4\left(mol\right)\)
\(V_{H_2\left(dktc\right)}=n\cdot22,4=0,4\cdot22,4=8,96\left(l\right)\)
\(m_{H_2SO_4}=n\cdot M=0,4\cdot\left(2+32+16\cdot4\right)=39,2\left(g\right)\)
\(m_{FeSO_4}=n\cdot M=0,4\cdot\left(56+32+16\cdot4\right)=60,8\left(g\right)\)
a.
n Fe=28562856=0,5 (mol)
Fe+H2SO4→FeSO4+H2↑
0,5→0,5 0,5 0,5 (mol)
b.
V H2(đktc)=0,5.22,4=11,2 (l)
c.
m HCl=0,5.36,5=18,25 (g)
d.
m FeSO4=0,5.152=76 (g)
\(n_{Fe}=\dfrac{5.6}{56}=0.1\left(mol\right)\)
\(n_{H_2SO_4}=\dfrac{14.7}{98}=0.15\left(mol\right)\)
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
\(1...........1\)
\(0.1............0.15\)
\(LTL:\dfrac{0.1}{1}< \dfrac{0.15}{1}\Rightarrow H_2SO_4dư\)
\(V_{H_2}=0.1\cdot22.4=2.24\left(l\right)\)
\(m_{FeSO_4}=0.1\cdot152=15.2\left(g\right)\)
\(n_{Fe}=0,1\left(mol\right)\); \(n_{H2SO4}=0,15\left(mol\right)\)
PTHH: \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\uparrow\)
LTL: 0,1 < 0,15 (mol)
Pư: 0,1→ 0,1 → 0,1 → 0,1 (mol)
Sau pư: 0 : 0,05 (mol)
a) \(V_{H_2\left(đktc\right)}=n.22,4=0,1.22,4=2,24\left(l\right)\)
b) \(m_{FeSO_4}=n.M=0,1.152=15,2\left(g\right)\)
`a)`
`Fe + H_2 SO_4 -> FeSO_4 + H_2`
`0,4` `0,4` `0,4` `(mol)`
`n_[Fe]=[22,4]/56=0,4(mol)`
`b)m_[FeSO_4]=0,4.152=60,8(g)`
`c)V_[H_2]=0,4.22,4=8,96(l)`
\(n_{Fe}=\dfrac{16,8}{56}=0,3\left(mol\right)\)
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
\(0,3->0,3-->0,3->0,3\)
\(mH_2SO_4=0,3.98=29,4\left(g\right)\)
\(\Rightarrow C\%_{ddH_2SO_4}=\dfrac{29,4.100}{200}=14,7\%\)
\(V_{FeSO_4}=\dfrac{n}{CM}=\dfrac{0,3}{2}=0,25\left(l\right)\)
\(VH_2=0,3.22,4=6,72\left(l\right)\)
\(n_{Fe}=\dfrac{16,8}{56}=0,3\left(mol\right)\\
pthh:Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
0,3 0,3 0,3 0,3
\(C\%_{H_2SO_4}=\dfrac{0,3.98}{200}.100\%=14,7\%\\
V_{FeSO_4}=\dfrac{0,3}{2}=0,15\left(l\right)\\
V_{H_2}=0,3.22,4=6,72\left(l\right)\)
Gọi x, y lần lượt là số mol Al, Fe
\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ Fe+H_2SO_4\rightarrow FeSO_4+H_2\\ n_{H_2}=\dfrac{0,56}{22,4}=0,025\left(mol\right)\\ Tacó:\left\{{}\begin{matrix}27x+56y=0,83\\1,5x+y=0,025\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}x=0,01\\y=0,01\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}m_{Al}=0,27\left(g\right)\\m_{Fe}=0,56\left(g\right)\end{matrix}\right.\)
nFe = 5,6/56 = 0,1 (mol)
Fe + H2SO4 --> FeSO4 + H2
0,1 0,1 0,1 0,1 (mol)
VH2 = 0,1.22,4 = 2,24 (l)
mdd H2SO4 = ( 0,1.98.100% ) / 9,8%= 100 (g)
mH2 = 0,1.2=0,2 (g)
mdd = mFe + mddH2SO4 - mH2
= 5,6 + 100 - 0,2 = 105,4 (g)
mFeSO4 = 0,1.152 = 15,2 (g)
C%ddFeSO4 = ( 15,2.100 ) / 105,4 = 14,42%
\(n_{H_2SO_4}=\dfrac{800.30\%}{98}=\dfrac{120}{49}\left(mol\right)\)
PTHH: Fe + H2SO4 --> FeSO4 + H2
\(\dfrac{120}{49}\)--->\(\dfrac{120}{49}\)--->\(\dfrac{120}{49}\)
=> \(V_{H_2}=\dfrac{120}{49}.22,4=\dfrac{384}{7}\left(l\right)\)
=> \(m_{FeSO_4}=\dfrac{120}{49}.152=\dfrac{18240}{49}\left(g\right)\)