\(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\)

PTHH :

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

0,4     0,8           0,4          0,4 

\(a,m_{HCl}=0,8.36,5=29,2\left(g\right)\)

\(b,V_{H_2}=n.22,4=0,4.24,79=9,916\left(l\right)\)

\(c,m_{ZnCl_2}=0,4.136=21,76\left(g\right)\)

`Zn+2HCl->ZnCl_2+H_2↑`

`a,n_(Zn)=26/65=0,4(mol)`

`=>n_(HCl)=2n_(Zn)=2.0,4=0,8(mol)`

`=>m_(HCl)=0,8.36,5=29,2(g)`

-

`b,` Từ câu `a,` suy ra `n_(H_2)=0,4(mol)`

`=>V_(H_2(đkc))=n_(H_2).24,79=0,4.24,79=9,913(l)`

-

`c,` Từ câu `a,` ta suy ra `n_(ZnCl_2)=0,4(mol)`

`=>m_(ZnCl_2)=0,4.136=21,76(g)`

\(n_{H_2\left(đkc\right)}=\dfrac{2,479}{24,79}=0,1\left(mol\right)\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\\ n_{Al}=n_{AlCl_3}=\dfrac{2}{3}.n_{H_2}=\dfrac{2}{3}.0,1=\dfrac{1}{15}\left(mol\right)\\ \Rightarrow m_{Al}=27.\dfrac{1}{15}=1,8\left(g\right)\\ m_{AlCl_3}=\dfrac{1}{15}.133,5=8,9\left(g\right)\)

\(n_{H_2}=\dfrac{2,479}{24,79}=0,1\left(mol\right)\)

PTHH: 2Al + 6HCl --> 2AlCl₃ + 3H₂

          \(\dfrac{1}{15}\)<--------------\(\dfrac{1}{15}\)<-----0,1

=> \(m_{Al}=\dfrac{1}{15}.27=1,8\left(g\right)\)

=> \(m_{AlCl_3}=\dfrac{1}{15}.133,5=8,9\left(g\right)\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\\ n_{Al}=n_{AlCl_3}=\dfrac{2}{3}n_{H_2}=\dfrac{2}{3}.\dfrac{2,497}{24,79}=\dfrac{1}{15}\left(mol\right)\\ \Rightarrow m_{Al}=\dfrac{1}{15}.27=1,8\left(g\right);m_{AlCl_3}=\dfrac{1}{15}.133,5=8,9\left(g\right)\)

Zn+2HCl->ZnCl2+H2

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

n Zn=0,1 mol

=>m Zncl2=0,1.136=13,6g

=>VH2=0,1.22,4=2,24l

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

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

Theo PT: \(n_{ZnCl_2}=n_{H_2}=n_{Zn}=0,2\left(mol\right)\)

\(\Rightarrow V_{H_2}=0,2.24,79=4,958\left(l\right)\)

\(m_{ZnCl_2}=0,2.136=27,2\left(g\right)\)

b, \(n_{HCl}=2n_{Zn}=0,4\left(mol\right)\)

\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\Rightarrow m_{ddHCl}=\dfrac{14,6}{7,3\%}=200\left(g\right)\)

Zn+2HCl->ZnCl2+H2

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

n Zn=0,5 mol

=>VH2=0,5.24,79=12,395l

=>m ZnCl2=0,5.136=68g

CuO+H2-to->Cu+H2O

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

=>m Cu=0,5.64=32g

\(n_{Zn}=\dfrac{9,75}{65}=0,15\left(mol\right)\\ pthh:Zn+H_2SO_4\rightarrow ZnSO_4+H_2\) 
            0,15   0,15          0,15       0,15 
\(V_{H_2}=0,15.22,4=3,36L\\ m_{H_2SO_4}=0,15.98=14,7\left(g\right)\\ m_{ZnSO_4}=161.0,15=24,15g\\ \) 
\(n_{CuO}=\dfrac{6}{80}=0,075\left(mol\right)\\ pthh:CuO+H_2\underrightarrow{t^o}Cu+H_2O\\ LTL:0,075< 0,15\) 
=> H2 dư 
\(n_{Cu}=n_{CuO}=0,075\left(mol\right)\\ m_{Cu}=0,075.64=4,8g\)

\(a.Mg+2HCl\rightarrow MgCl_2+H_2\\ b.n_{Mg}=\dfrac{4,8}{24}=0,2mol\\ Mg+2HCl\rightarrow MgCl_2+H_2\)

0,2        0,4            0,2           0,2

\(V_{H_2}=0,2.24,79=4,958l\\ c.m_{MgCl_2}=0,2.95=19g\\ d.C_{M_{HCl}}=\dfrac{0,4}{0,3}=\dfrac{4}{3}M\)

a, nMg=0,2(mol)

Mg+2HCl=>MgCl2+H2

b, nH2=nMg=0,2(mol)

=>VH2=4,958(l)

c,nMgCl2=nMg=0,2(mol)

=>mMgCl2=19(g)

d,nHCl=2nMg=0,4(mol)

=>cM(HCl)=0,75(M)

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

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

_____0,2____0,4___________0,2 (mol)

\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)

b, \(V_{H_2}=0,2.24,79=4,958\left(l\right)\)

c, \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

____________0,2__2/15 (mol)

\(\Rightarrow m_{Fe}=\dfrac{2}{15}.56=\dfrac{112}{15}\left(g\right)\)

Số mol của 13 gam Zn:

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

PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)

            1     :   2      :     1      :      1 (g)

          0,2\(\rightarrow\) 0,4       :     0,2  :       0,2  (mol)

a,Khối lượng của 0,4 mol HCl:

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

b, Thể tích khí H2:

\(V_{H_2}=n.24,79=0,2.24,79=4,958\left(l\right)\)

\(3H_2+Fe_2O_3\underrightarrow{t^o}2Fe+3H_2O\)

Khối lượng của \(\dfrac{2}{15}\) mol Fe:

\(n_{Fe}=\dfrac{m}{M}=\dfrac{2}{\dfrac{15}{56}}\approx7,5\left(g\right)\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05\left(mol\right)\)

PTHH: Zn + 2HCl ---> ZnCl₂ + H₂

         0,05-->0,1------>0,05--->0,05

         FeO + H₂ --t^o--> Fe + H₂O

                  0,05------>0,05

=> \(\left\{{}\begin{matrix}m_{ZnCl_2}=0,05.136=6,8\left(g\right)\\V_{H_2}=0,05.24,79=1,2395\left(l\right)\\m_{Fe}=0,05.56=2,8\left(g\right)\end{matrix}\right.\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05\left(mol\right)\\ pthh:Zn+2HCl\rightarrow ZnCl_2+H_2\) 
          0,05                  0,05       0,05 
\(m_{ZnCl_2}=0,05.136=6,8\left(g\right)\\ V_{H_2}=0,05.24,79=1,2395l\) 
\(FeO+H_2\underrightarrow{t^o}Fe+H_2O\) 
 0,05   0,05   0,05 
\(m_{Fe}=0,05.56=2,8g\)