\(a,\text{Sơ đồ p/ứ: }Fe+HCl\to FeCl_2+H_2\\ b,PTHH:Fe+2HCl\to FeCl_2+H_2\\ c,\text{Bảo toàn KL: }m_{Fe}+m_{HCl}=m_{FeCl_2}+m_{H_2}\\ \Rightarrow m_{HCl}+56=150+8=158\\ \Rightarrow m_{HCl}=102(g)\)

\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(0.2......0.4...........0.2.........0.2\)

\(V_{H_2}=0.2\cdot22.4=4.48\left(l\right)\)

\(m_{HCl}=0.4\cdot36.5=14.6\left(g\right)\)

\(BTKL:\)

\(m_{HCl}=m_{FeCl_2}+m_{H_2}-m_{Fe}=0.2\cdot127+0.2\cdot2-11.2=14.6\left(g\right)\)

\(a) Fe + 2HCl \to FeCl_2 + H_2\\ b) n_{H_2} = n_{Fe} = \dfrac{11,2}{56} = 0,2(mol)\\ \Rightarrow V_{H_2} = 0,2.22,4 = 4,48(lít)\\ c)C_1 : n_{HCl} = 2n_{Fe} = 0,4(mol) \Rightarrow m_{HCl} = 0,4.36,5 = 14,6(gam)\\ C_2 : \text{Bảo toàn khối lượng : }\\ m_{Fe} + m_{HCl} = m_{FeCl_2} + m_{H_2}\\ \Rightarrow m_{HCl} = 0,2.127 + 0,2.2 - 11,2 = 14,6(gam) \)

`a)PTHH:`

`Fe + 2HCl -> FeCl_2 + H_2`

`0,3`    `0,6`          `0,3`     `0,3`       `(mol)`

`n_[Fe]=[22,4]/56=0,4(mol)`

`n_[HCl]=0,3.2=0,6(mol)`

Ta có:`[0,4]/1 > [0,6]/2`

   `=>Fe` dư

`b)m_[FeCl_2]=0,3.127=38,1(g)`

`c)m_[Fe(dư)]=(0,4-0,3).56=5,6(g)`

\(n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\\ n_{HCl}=0,3.2=0,6\left(mol\right)\\ pthh:Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\\ LTL:\dfrac{0,4}{1}>\dfrac{0,6}{2}\) 
=> Fe dư 
\(n_{FeCl_2}=\dfrac{1}{2}n_{HCl}=0,3\left(mol\right)\\ m_{FeCl_2}=0,3.127=38,1\left(g\right)\\ n_{Fe\left(p\text{ư}\right)}=\dfrac{1}{2}n_{HCl}=0,3\left(mol\right)\\ m_{Fe\left(d\right)}=\left(0,4-0,3\right).56=5,6\left(g\right)\)

\(n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\)

\(n_{HCl}=0,3.2=0,6\left(mol\right)\)

       \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

Xét: \(\dfrac{0,4}{1}>\dfrac{0,6}{2}\)                            ( mol )

         0,3      0,6          0,3               ( mol )

\(m_{FeCl_2}=0,3.127=38,1\left(g\right)\)

\(m_{Fe\left(dư\right)}=\left(0,4-0,3\right).56=5,6\left(g\right)\)

a) \(PTHH:Fe+HCL\) → \(FeCl_2+H_2\)

Cân bằng: \(Fe+2HCl\) → \(FeCl_2+H_2\)

b) \(n_{Fe}=\dfrac{m}{M}=\dfrac{5,6}{56}=0,1\left(mol\right)\)

\(n_{HCl}=2.n_{Fe}=2.0,1=0,2\left(mol\right)\)

\(m_{HCl}=n.M=0,2.36,5=7,3\left(g\right)\)

c) \(n_{Fe}=n_{H_2}=0,1\left(mol\right)\)

\(V_{H_2\left(đktc\right)}=n.22,4=0,1.22,4=2,24\left(l\right)\)

\(n_{Fe}=\dfrac{5,6}{56}=0,1mol\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

0,1  < 0,4                              ( mol )

0,1                                    0,1   ( mol )

\(V_{H_2}=0,1.22,4=2,24l\)

\(n_{ZnCl_2}=\dfrac{0,1.1}{1}=0,1mol\)

`n_[FeO]=[14,4]/72=0,2(mol)`

`a)PTHH:`

`FeO + 2HCl -> FeCl_2 + H_2 O`

`0,2`       `0,4`            `0,2`                          `(mol)`

`b)m_[FeCl_2]=0,2.127=25,4(g)`

`c)m_[dd HCl]=[0,4.36,5]/10 .100=146(g)`

`d)C%_[FeCl_2]=[25,4]/[14,4+146].100~~15,84%`

a) \(PTHH:Mg+2HCl\rightarrow MgCl_2+H_2\) 

b) \(n_{Mg}=\dfrac{4,8}{24}=0,2mol\) 

\(n_{HCl}=2.n_{Mg}=0,2.2=0,4mol\)

\(\Rightarrow m_{HCl}=n.M=0,4.36,5=14,6g\)

c) \(n_{H_2}=n_{Mg}=0,2mol\) 

Thể tích khí hidro sinh ra (ở đktc): 

\(V_{H_2}=0,2.24,79=4,958l.\)

a. \(Fe+2HCl\rightarrow FeCl_2+H_2\)

b. \(n_{Fe}=\dfrac{m_{Fe}}{M_{Fe}}=\dfrac{28}{56}=0,5\left(mol\right)\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

0,5-------1---------0,5-----0,5

Theo PTHH: \(\Rightarrow n_{H_2}=n_{Fe}=0,5\left(mol\right)\)

\(V_{H_2}=n_{H_2}.22,4=0,5.22,4=11,2\left(l\right)\)

c. \(H_2+CuO\rightarrow Cu+H_2O\)

  0,5-------0,5-----0,5----0,5

\(\Rightarrow m_{Cu}=n_{Cu}.M_{Cu}=0,5.64=32\left(g\right)\)

\(a.Fe+2HCl\rightarrow FeCl_2+H_2\) 

_________0,1__________0,1

\(b.n_{H_2}=\dfrac{0,2}{2}=0,1\left(mol\right)\\ \Rightarrow m_{FeCl_2}=0,1.127=12,7\left(g\right)\)