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

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

=> \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

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

Ta có \(n_{Zn}=\dfrac{13}{65}=0.2\left(mol\right)\)

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

           0,2---->0,4----->0,2------->0,2(mol)

\(V_{H_2\left(đktc\right)}=0,2\cdot22,4=4,48\left(l\right)\)

\(m_{ZnCl_2}=0,2\cdot\left(65+35,5\cdot2\right)=27,2\left(g\right)\)

Tick nha

a: \(n_{Zn}=\dfrac{2.6}{65}=0.04\left(mol\right)\)

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

0,04                 0,04

\(m_{ZnCl_2}=0.04\left(65+35.5\cdot2\right)=5.44\left(g\right)\)

b: \(n_{HCl}=2\cdot0.04=0.08\left(mol\right)\)

\(m_{ct\left(HCl\right)}=0.08\cdot36.5=2.92\left(g\right)\)

\(C\%\left(HCl\right)=\dfrac{2.92}{200}=0.0146\)

d: \(n_{H_2}=n_{Zn}=0.04\left(mol\right)\)

V=0,04*22,4=0,896(lít)

\(a)n_{Zn}=\dfrac{2,6}{65}=0,04mol\\ Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)

0,04         0,08          0,04         0,04

\(m_{ZnCl_2}=0,04.136=5,44g\\ b)C_{\%HCl}=\dfrac{0,08.36,5}{200}\cdot100=1,46\%\\ c)C_{M\left(HCl\right)}=\dfrac{0,08}{0,2}=0,4M\\ d)V_{H_2}=0,04.22,4=0,896l\\ e)H_2+CuO\underrightarrow{t^0}Cu+H_2O\\ n_{Cu}=n_{H_2}=0,04mol\\ m_{Cu}=0,04.64=2,56g\)

a) Zn + 2HCl --> ZnCl₂ + H₂

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

PTHH: Zn + 2HCl --> ZnCl₂ + H₂

           0,2-->0,4------------>0,2

=> V_H2 = 0,2.22,4 = 4,48 (l)

c) m_HCl = 0,4.36,5 = 14,6 (g)

nZn = 13 : 65 = 0,2 (mol) 
pthh : Zn + 2HCl --> ZnCl2 + H2
          0,2 ------------> 0,2 ---->0,2 (mol)  
VH2 = 0,2 . 22,4 = 4,48 (l) 
mZnCl2 = 0,2 . 36,5 = 14,6 (g) 

\(a,PTHH:Zn+2HCl\to ZnCl_2+H_2\\ b,n_{Zn}=\dfrac{13}{65}=0,2(mol)\)

Vì \(\dfrac{n_{Zn}}{1}>\dfrac{n_{HCl}}{2}\) nên Zn dư

\(\Rightarrow n_{Zn({\text{phản ứng})}}=\dfrac{1}{2}n_{HCl}=0,15(mol)\\ \Rightarrow n_{Zn(\text{dư})}=0,2-0,15=0,05(mol)\\ \Rightarrow m_{Zn(\text{dư})}=0,05.65=3,25(g)\\ c,n_{ZnCl_2}=n_{H_2}=\dfrac{1}{2}n_{HCl}=0,15(mol)\\ \Rightarrow a=m_{ZnCl_2}=0,15.136=20,4(g)\\ V=V_{H_2}=0,15.22,4=3,36(l)\)

3,36

\(a,Zn+2HCl\rightarrow ZnCl_2+H_2\\ n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\\ Ta.c\text{ó}:\dfrac{0,2}{1}>\dfrac{0,3}{2}\Rightarrow Zn.d\text{ư}\\ b,n_{Zn\left(d\text{ư}\right)}=0,2-\dfrac{0,3}{2}=0,05\left(mol\right)\\ \Rightarrow m_{Zn\left(d\text{ư}\right)}=0,05.65=3,25\left(g\right)\\ c,a=m_{ZnCl_2}=0,15.136=20,4\left(g\right)\\ V=V_{H_2\left(\text{đ}ktc\right)}=0,15.22,4=3,36\left(l\right)\)

n_Zn  = 6,5 : 65 = 0,1 (mol) 
pthh: Zn+2HCl -> ZnCl₂ + H2 
        0,1   0,1                      0,1
=> m_HCl  = 0,1 . 36,5 = 3,65(g) 
pthh : CuO + H₂ -to-> Cu + H₂O 
                     0,1          0,1 
=> m_Cu  = 0,1 . 64 = 6,4 (g) 
 

Ta có: \(n_{Al}=\dfrac{4,86}{27}=0,18\left(mol\right)\)

PT: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

a, \(n_{HCl}=3n_{Al}=0,54\left(mol\right)\Rightarrow C_{M_{HCl}}=\dfrac{0,54}{0,15}=3,6\left(M\right)\)

b, \(n_{AlCl_3}=n_{Al}=0,18\left(mol\right)\Rightarrow m_{AlCl_3}=0,18.133,5=24,03\left(g\right)\)

c, \(n_{H_2}=\dfrac{3}{2}n_{Al}=0,27\left(mol\right)\Rightarrow V_{H_2}=0,27.24,79=6,6933\left(l\right)\)

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

a) Pt : \(Zn+2HCl\rightarrow ZnCl_2+H_2|\)

            1          2             1           1

         0,05      0,1                       0,05

b) \(n_{H2}=\dfrac{0,05.1}{1}=0,05\left(mol\right)\)

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

c) \(n_{HCl}=\dfrac{0,05.2}{1}=0,1\left(mol\right)\)

200ml = 0,2l

\(C_{M_{ddHCl}}=\dfrac{0,1}{0,2}=0,5\left(M\right)\)

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