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a, \(FeO+H_2\underrightarrow{t^o}Fe+H_2O\)
b, \(n_{FeO}=\dfrac{7,2}{72}=0,1\left(mol\right)\)
\(n_{Fe}=n_{FeO}=0,1\left(mol\right)\Rightarrow m_{Fe}=0,1.56=5,6\left(g\right)\)
c, \(n_{H_2}=n_{FeO}=0,1\left(mol\right)\Rightarrow V_{H_2}=0,1.22,4=2,24\left(l\right)\)
\(n_{Mg}=\dfrac{4,8}{24}=0,2\left(mol\right)\\ pthh:Mg+2HCl\rightarrow MgCl_2+H_2\)
0,2 0,4 0,2
\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\\ V_{H_2}=0,2.22,4=4,48\left(l\right)\\ pthh:FeO+H_2\underrightarrow{t^o}Fe+H_2O\)
0,2 0,2 0,2
\(m_{Fe}=0,2.56=11,2\left(g\right)\)
\(n_{Fe_2O_3}=\dfrac{16}{160}=0,1\left(mol\right)\\ Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\\ n_{H_2}=3.0,1=0,3\left(mol\right)\\ a.V_{H_2\left(đktc\right)}=0,3.22,4=6,72\left(l\right)\\ b.m_{Fe}=0,2.\left(100\%-5\%\right).56=10,64\left(g\right)\)
a, \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
b, \(n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\)
Theo PT: \(n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,2\left(mol\right)\Rightarrow m_{Fe_2O_3}=0,2.160=32\left(g\right)\)
c, \(n_{H_2}=\dfrac{3}{2}n_{Fe}=0,6\left(mol\right)\Rightarrow V_{H_2}=0,6.22,4=13,44\left(l\right)\)
d, \(2H_2+O_2\underrightarrow{t^o}2H_2O\)
Theo PT: \(n_{O_2}=\dfrac{1}{2}n_{H_2}=0,3\left(mol\right)\Rightarrow V_{O_2}=0,3.22,4=6,72\left(l\right)\)
\(\Rightarrow V_{kk}=\dfrac{V_{O_2}}{20\%}=33,6\left(l\right)\)
a)
$Fe_2O_3 + 3H_2 \xrightarrow{t^o} 2Fe + 3H_2O$
b) $n_{Fe} = \dfrac{22,4}{56} = 0,4(mol)$
Theo PTHH : $n_{Fe_2O_3} = \dfrac{1}{2}n_{Fe} = 0,2(mol)$
$m_{Fe_2O_3} = 0,2.160 = 32(gam)$
c) $n_{H_2} = \dfrac{3}{2}n_{Fe} = 0,6(mol)$
$V_{H_2} = 0,6.22,4 = 13,44(lít)$
d) $2H_2 + O_2 \xrightarrow{t^o} 2H_2O$
$V_{O_2} = \dfrac{1}{2}V_{H_2} = 6,72(lít)$
$V_{kk} = 6,72 : 20\% = 33,6(lít)$
\(n_{FeO}=\dfrac{3.2}{72}=\dfrac{2}{45}\left(mol\right)\)
\(FeO+H_2\underrightarrow{^{^{t^0}}}Fe+H_2O\)
\(\dfrac{2}{45}....\dfrac{2}{45}....\dfrac{2}{45}\)
\(V_{H_2}=\dfrac{2}{45}\cdot22.4=1\left(l\right)\)
\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{^{t^0}}FeCl_3\)
\(\dfrac{2}{45}.............\dfrac{2}{45}\)
\(m_{FeCl_3}=\dfrac{2}{45}\cdot162.5=7.22\left(g\right)\)
hình như bn ghi sai r đó phải là:đồng oxit mới phải chứ
CuO+H2-to>Cu+H2O
0,09----0,09---0,09
n CuO=\(\dfrac{7,2}{80}\)=0,09 mol
=>m Cu=0,09.64=5,76g
=>VH2=0,09.22,4=2,016l
\(n_{CuO}=\dfrac{7,2}{80}=0,09mol\)
\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)
0,09 0,09 0,09 ( mol )
\(m_{Cu}=0,09.64=5,76g\)
\(V_{H_2}=0,09.22,4=2,016l\)
\(n_{Fe_3O_4}=\dfrac{24}{232}=\dfrac{3}{29}\left(mol\right)\)
PTHH :
\(Fe_3O_4+4H_2\underrightarrow{t^o}3Fe+4H_2O\)
3/29 9/29
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
9/29 18/29
\(c,V_{HCl}=\dfrac{\dfrac{18}{29}}{1,5}=\dfrac{12}{29}\left(l\right)\)
FeO+H2-to>Fe+H2O
0,1------0,1----0,1
n FeO=0,1 mol
=>VH2=0,1.22,4=2,24l
=>m Fe=0,1.56=5,6g