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Fe+2Hcl->FeCl2+H2
0,1---------------------0,1
2H2+O2-to>2H2O
0,1--------------0,1
n Fe=0,1 mol
=>VH2=0,1.22,4=2,24l
c) m H2O=0,1.18.95%=1,71g
\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
PTHH:
Fe + 2HCl ---> FeCl2 + H2
0,1 0,1
2H2 + O2 --to--> 2H2O
0,1 0,1
\(\rightarrow\left\{{}\begin{matrix}V_{H_2}=0,1.22,4=2,24\left(l\right)\\m_{H_2O}=0,1.18.\left(100\%-5\%\right)=1,71\left(g\right)\end{matrix}\right.\)
$n_{Fe}=\dfrac{2,24}{56}=0,04(mol)$
$a,PTHH:Fe+2HCl\to FeCl_2+H_2$
$b,$ Theo PT: $n_{H_2}=n_{Fe}=0,04(mol)$
$\Rightarrow V_{H_2}=0,04.22,4=0,896(l)$
\(n_{HCl}=0,1mol\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,1 0,2 0,1 0,1
\(m_{FeCl_2}=0,1\cdot127=12,7g\)
\(V_{H_2}=0,1\cdot22,4=2,24l\)
a, \(Fe+2HCl\rightarrow FeCl_2+H_2\)
b, Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
Theo PT: \(n_{FeCl_2}=n_{H_2}=n_{Fe}=0,1\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,1.24,79=2,479\left(l\right)\)
\(m_{FeCl_2}=0,1.127=12,7\left(g\right)\)
\(n_{Fe}=\dfrac{5.6}{56}=0.1\left(mol\right)\)
\(n_{HCl}=\dfrac{10.95}{36.5}=0.3\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
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, \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
PTHH: Zn + 2HCl → ZnCl2 + H2
Mol: 0,2 0,2 0,2
b, \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)
c, \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)
d,
PTHH: H2 + CuO → Cu + H2O
Mol: 0,2 0,2
\(m_{Cu}=0,2.64=12,8\left(g\right)\)
\(n_{H_2}=\dfrac{37,185}{24,79}=1,5mol\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{Fe}=n_{H_2}=1,5mol\\ m_{Fe}=1,5.56=84g\)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
Ta có: \(n_{H_2}=\dfrac{37,185}{24,79}=1,5\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{H_2}=1,5\left(mol\right)\)
\(\Rightarrow m_{Fe}=1,5.56=84\left(g\right)\)
\(a)Fe+2HCl\rightarrow FeCl_2+H_2\\ b)n_{HCl}=\dfrac{200.18,25\%}{100\%.36,5}=1mol\\ n_{FeCl_2}=n_{H_2}=\dfrac{1}{2}n_{HCl}=1:2=0,5mol\\ m_{FeCl_2}=0,5.127=63,5g\\ c)V_{H_2}=0,5.24,79=12,395l\)
\(C\%_{ddHCl}=\dfrac{m_{HCl}}{m_{ddHCl}}.100\%\)
\(\Leftrightarrow m_{HCl}=\dfrac{C\%_{ddHCl}.m_{ddHCl}}{100\%}\)
\(\Leftrightarrow m_{HCl}=\dfrac{18,25\%.200}{100\%}\)
\(\Rightarrow m_{ddHCl}=36,5g\)
\(n_{HCl}=\dfrac{m}{M}=\dfrac{36,5}{36,5}=1mol\)
PTHH: Fe + 2HCl \(\rightarrow\) FeCl2 + H2
TL: 1 2 1 1
mol: 0,5 \(\leftarrow\) 1 \(\rightarrow\) 0,5 \(\rightarrow\) 0,5
\(a.m_{FeCl_2}=n.M=0,5.127=63,5g\)
\(c.V_{H_2}=n.22,4=0,5.22,4=11,2l\)