`Zn + 2HCl -> ZnCl_2 + H_2`

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

`n_[Zn]=13/65=0,2(mol)`

`a)V_[H_2]=0,2.22,4=4,48(l)`

`b)C%_[HCl]=[0,4.36,5]/100 . 100 =14,6%`

`c)C%_[ZnCl_2]=[0,2.136]/[13+100-0,2.2].100~~24,16%`

`d)`

`H_2 + CuO` $\xrightarrow{t^o}$ `Cu + H_2 O`

`0,1`     `0,1`          `0,1`                    `(mol)`

`n_[CuO]=8/80=0,1(mol)`

Ta có:`[0,2]/1 > [0,1]/1`

  `=>H_2` dư, `CuO` hết

`=>m_[Cu]=0,1.64=6,4(g)`

\(n_{Zn}=\dfrac{13}{65}=0,2mol\)

\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)

0,2      0,2                0,2       0,2

a)\(V_{H_2}=0,2\cdot22,4=4,48l\)

b)\(m_{H_2SO_4}=0,2\cdot98=19,6g\)

   \(C\%=\dfrac{m_{ct}}{m_{dd}}\cdot100\%=\dfrac{19,6}{100}\cdot100\%=19,6\%\)

c)\(m_{ZnSO_4}=0,2\cdot161=32,2g\)

   \(m_{ddZnSO_4}=13+100-0,2\cdot2=112,6g\)

   \(C\%=\dfrac{m_{ct}}{m_{dd}}\cdot100\%=\dfrac{32,2}{112,6}\cdot100\%=28,6\%\)

d)\(n_{CuO}=\dfrac{8}{80}=0,1mol\)

   \(CuO+H_2\rightarrow Cu+H_2O\)

   0,1        0,2     0,1

   \(m_{Cu}=0,1\cdot64=6,4g\)

\(n_{Zn}=\dfrac{9.75}{65}=0.15\left(mol\right)\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(0.15.....0.3...................0.15\)

\(V_{H_2}=0.15\cdot22.4=3.36\left(l\right)\)

\(m_{HCl}=0.3\cdot36.5=10.95\left(g\right)\)

`Fe + 2HCl -> FeCl_2 + H_2 \uparrow`

 `0,1`      `0,2`          `0,1`       `0,1`         `(mol)`

`n_[Fe]=[5,6]/56=0,1(mol)`

`a)V_[H_2]=0,1.22,4=2,24(l)`

`b)C_[M_[HCl]]=[0,2]/[0,1]=2(M)`

\(n_{Zn}=\dfrac{26}{65}=0.4\left(mol\right)\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(0.4.......0.8....................0.4\)

\(m_{HCl}=0.8\cdot36.5=29.2\left(g\right)\)

\(V_{H_2}=0.4\cdot22.4=8.96\left(l\right)\)

nHCl = 0.3*0.75 = 0.225 (mol) 

Zn + 2HCl => ZnCl2  + H2 

0.1125..0.225....0.1125..0.1125

mZn = 0.1125*65 = 7.3125 (g) 

VH2 = 0.1125*22.4 = 2.52 (l) 

CM ZnCl2 = 0.1125/0.3 = 0.375 (M)

nHCl= 0,75 x 0,3= 0,225(mol)

PTHH: Zn +  2HCl -> ZnCl2 + H2

a) 0,1125____0,225___0,1125___0,1125(mol)

=> a=mZn=0,1125.65=7,3125(g)

V(H2,đktc)=0,1125 x 22,4=2,52(l)

b) VddZnCl2=VddHCl=0,3(l)

=>CMddZnCl2=0,1125/0,3=0,375(M)

\(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)

\(PTHH:Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)

(mol)_____0,2____0,2______0,2____0,2__

\(a.V_{H_2}=22,4.0,2=4,48\left(l\right)\)

\(b.m_{ddH_2SO_4}=\dfrac{0,2.98.100}{24,5}=80\left(g\right)\)

\(c.m_{ddspu}=13+80-0,2.2=92,6\left(g\right)\\ \Rightarrow C\%_{ddspu}=\dfrac{0,2.136}{92,6}.100=29,4\left(\%\right)\)