a, \(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

Theo PT: \(n_{Fe}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)

\(n_{HCl}=2n_{H_2}=0,3\left(mol\right)\Rightarrow m_{HCl}=0,3.36,5=10,95\left(g\right)\)

b, \(n_{FeCl_2}=n_{H_2}=0,15\left(mol\right)\Rightarrow m_{FeCl_2}=0,15.127=19,05\left(g\right)\)

\(a/n_{H_2}=\dfrac{3,36}{22,4}=0,15mol\\ Fe+2HCl\rightarrow FeCl_2+H_2\)

0,15       0,3           0,15          0,15

\(m_{Fe}=0,15.56=8,4g\\ m_{HCl}=0,3.36,5=10,95g\\ b/m_{FeCl_2}=0,15.127=19,05g\)

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

0,15   0,3          0,15       0,15

\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

\(a,m_{Fe}=0,15.56=8,4\left(g\right)\)

\(m_{HCl}=0,3.36,5=10,95\left(g\right)\)

\(b,m_{FeCl_2}=0,15.127=19,05\left(g\right)\)

Fe + 2HCl \(\rightarrow FeCl_2+H_2\)

a) nFe = \(\dfrac{5,6}{56}=0,1mol\)

Theo pt nH₂ = nFe = 0,1 mol

=> VH₂ = 0,1.22,4 = 2,24 lít

b) Theo pt: nFeCl₂ = nFe = 0,1 mol

=> mFeCl₂ = 0,1.127 = 12,7g

c) Theo pt : nHCl = 2nFe = 0,2 mol

=> mHCl = 0,2.36,5 = 7,3g

\(n_{HCl}=0,5.0,2=0,1\left(mol\right)\)

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

      0,05<--0,1----->0,05--->0,05

\(m_{Fe}=0,05.56=2,8\left(g\right)\)

\(m_{FeCl2}=0,05.127=6,35\left(g\right)\)

\(V_{H2\left(dktc\right)}=0,05.22,4=1,12\left(l\right)\)

\(V_{H2\left(dkc\right)}=0,05.24,79=1,2395\left(l\right)\)

\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)

a) PTHH: Fe + 2HCl --> FeCl₂ + H₂

_______0,2---->0,4----->0,2--->0,2

=> V_H2 = 0,2.22,4 = 4,48(l)

b) m_HCl = 0,4.36,5 = 14,6(g)

c) m_FeCl2 = 0,2.127 = 25,4 (g)

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

\(\rightarrow\left\{{}\begin{matrix}V_{H_2}=0,1.22,4=2,24\left(l\right)\\m_{H_2O}=0,1.18.\left(100\%-5\%\right)=1,71\left(g\right)\end{matrix}\right.\)

nFe = 5,6 : 56 = 0,1 (mol) 
pthh : Fe + 2HCl -> FeCl2 + H2 
         0,1                               0,1 
=> V_H2 = 0,1 . 22,4 = 2,24 (l)
PTHH :  2H2O -đp--> 2H2 + O2 
             0,1                 0,1 
nH2O(tt) = 95% nH2O(lt)
              => nH2O(tt) = 95% . 0,1 = 0,097(mol) 
=>mH2O  = 0,097 . 18 = 1,746 (G)

Câu 1

a) Fe + 2HCl --> FeCl₂ + H₂

b) \(n_{Fe}=\dfrac{1,12}{56}=0,02\left(mol\right)\)

PTHH: Fe + 2HCl --> FeCl₂ + H₂

____0,02------------>0,02--->0,02

=> m_FeCl2 = 0,02.127 = 2,54(g)

c) V_H2 = 0,02.24,79 = 0,4958(l)

Câu 2

a) S + O₂ --t^o--> SO₂

b) \(n_S=\dfrac{1,6}{32}=0,05\left(mol\right)\)

PTHH:  S + O₂ --t^o--> SO₂

_____0,05--------->0,05

=> V_SO2 = 0,05.24,79 = 1,2395(l)

\(n_{H_2}=\dfrac{37,185}{24,79}=1,5mol\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{Fe}=n_{H_2}=1,5mol\\ m_{Fe}=1,5.56=84g\)

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: \(n_{Fe}=n_{H_2}=1,5\left(mol\right)\)

\(\Rightarrow m_{Fe}=1,5.56=84\left(g\right)\)

\(n_{Fe}=\dfrac{m}{M}=\dfrac{28}{56}=0,5\left(mol\right)\\ PTHH:Fe+2HCl->FeCl_2+H_2\)

ti le        1      :    2       :      1      :    1

n(mol)     0,5-->1--------->0,5------>0,5

\(m_{FeCl_2}=n\cdot M=0,5\cdot\left(56+35,5\cdot2\right)=63,5\left(g\right)\\ V_{H_2\left(dktc\right)}=n\cdot22,4=0,5\cdot22,4=11,2\left(l\right)\)

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

Ta có: \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{H_2}=n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\\n_{HCl}=2n_{Fe}=0,4\left(mol\right)\end{matrix}\right.\)

a, Ta có: \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

b, \(V_{ddHCl}=\dfrac{0,4}{1,5}\approx0,267\left(l\right)\)

c, \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)

Bạn tham khảo nhé!