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\(a,Fe_2O_3+3H_2\to2Fe+3H_2O\\ b,n_{Fe}=\dfrac{21}{56}=0,375(mol)\\ \Rightarrow n_{Fe_2O_3}=0,1875(mol)\\ \Rightarrow m_{Fe_2O_3}=0,1875.160=30(g)\)
PTHH: \(Fe_2O_3+3H_2\xrightarrow[]{t^o}2Fe+3H_2O\)
Ta có: \(n_{Fe}=\dfrac{21}{56}=0,375\left(mol\right)\)
\(\Rightarrow n_{Fe_2O_3}=0,1875\left(mol\right)\) \(\Rightarrow m_{Fe_2O_3}=0,1875\cdot160=30\left(g\right)\)
$a)n_{Fe}=\dfrac{42}{56}=0,75(mol)$
$Fe_2O_3+3H_2\xrightarrow{t^o}2Fe+3H_2O$
$\Rightarrow n_{Fe_2O_3}=0,5n_{Fe}=0,375(mol)$
$\Rightarrow m_{Fe_2O_3}=0,375.160=60(g)$
$b)n_{H_2O}=1,5n_{Fe}=1,125(mol)$
$\Rightarrow m_{H_2O}=1,125.18=20,25(g)$
\(Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\uparrow\\ n_{Fe}=\dfrac{1,12}{56}=0,02(mol)\\ \Rightarrow n_{CO}=0,03(mol)\\ \Rightarrow V_{CO}=0,03.22,4=0,672(l)=672(ml)\)
ta có nCO2=\(\frac{13.44}{22.4}\)=0,6 mol
bt1) Fe2O3+ CO\(\rightarrow\) CO2+Fe
ta có nFe= 0,6 mol
vậy mFe=0,6.56=33,6
`Fe + 2HCl -> FeCl_2 + H_2`
`0,2` `0,2` `0,2` `(mol)`
`n_[Fe]=[11,2]/56=0,2(mol)`
`a)m_[FeCl_2]=0,2.127=25,4(g)`
`b)V_[H_2]=0,2.22,4=4,48(l)`
`c)n_[O_2]=[4,48]/[22,4]=0,2(mol)`
`2H_2 + O_2` $\xrightarrow{t^o}$ `2H_2 O`
`0,2` `0,1` `0,2` `(mol)`
Ta có:`[0,2]/2 < [0,2]/1`
`=>O_2` dư
`=>m_[H_2 O]=0,2.18=3,6(g)`
\(\begin{array} {l} a)\\ Fe+2HCl\to FeCl_2+H_2\\ n_{Fe}=\dfrac{11,2}{56}=0,2(mol)\\ n_{FeCl_2}=n_{Fe}=0,2(mol)\\ m_{FeCl_2}=0,2.127=25,4(g)\\ b)\\ n_{H_2}=n_{Fe}=0,2(mol)\\ V_{H_2}=0,2.22,4=4,48(l)\\ c)\\ n_{O_2}=\dfrac{4,48}{22,4}=0,2(mol)\\ 2H_2+O_2\xrightarrow{t^o}2H_2O\\ \dfrac{n_{H_2}}{2}<n_{O_2}\to O_2\text{ dư}\\ n_{H_2O}=n_{H_2}=0,2(mol)\\ m_{H_2O}=0,2.18=3,6(g) \end{array}\)
a: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)
nên \(n_{FeCl_2}=0,2\left(mol\right)\)
\(m_{FeCl_2}=0.2\cdot127=25,4\left(g\right)\)
b: \(V_{H_2}=0.2\cdot22.4=4.48\left(lít\right)\)
