\(m_{Zn}=60,5-28=32,5g\\ n_{Fe}=\dfrac{28}{56}=0,5\left(mol\right)\\ n_{Zn}=\dfrac{32,5}{65}=0,5\left(mol\right)\\ pthh:Zn+2HCl\rightarrow ZnCl_2+H_2\) 
           0,5                    0,5               0,5 
          \(Fe+2HCl\rightarrow FeCl_2+H_2\) 
            0,5                     0,5        0,5 
\(V_{H_2}=\left(0,5+0,5\right).22,4=22,4\left(L\right)\\ m_{Mu\text{ối}}=\left(0,5.136\right)+\left(0,5.127\right)=131,5g\)

a) Ta có: m_Fe = \(\frac{60,5.46,289}{100}\) \(\approx\) 28g

\(\Rightarrow\) m_Zn = 60,5 - 28 = 32,5g

b) PTPỨ: Zn + 2HCl \(\rightarrow\) ZnCl₂ + H₂ (1)

                  Fe + 2HCl \(\rightarrow\) FeCl₂ + H₂ (2)

Theo ptr (1): n_{H2 (1)} = n_Zn = \(\frac{32,5}{65}\)= 0,5 mol

Theo ptr (2) : n _{H2 (2)} = n_Fe = \(\frac{28}{56}\) = 0,5 mol

\(\Rightarrow\) V_H2 = (n_{H2 (1)} + n_{H2 (2)} ) . 22,4 = (0,5 + 0,5).22,4=22,4 lít

c) Theo (1): n_ZnCl2 = n_Zn = 0,5 mol

\(\Rightarrow\) m_ZnCl2 = 0,5.136 = 68(g)

Theo (2): nFeCl2 = n_Fe = 0,5 mol

\(\Rightarrow\) m_FeCl2 = 0,5 . 127 = 63,5 g

Zn+2HCl\(\rightarrow\)ZnCl₂+H₂\(\uparrow\)

1 2 1 1 (mol)

0.5 (mol)

Fe+2HCl\(\rightarrow\)FeCl₂+H₂\(\uparrow\)

1 2 1 1 (mol)

0.5 (mol)

mFe=60.5\(\times\)46,289=28(g)

nFe=\(\dfrac{m}{M}\)=\(\dfrac{28}{56}\)=0.5(mol)

mZn=60.5-28=32.5(g)

nZn=\(\dfrac{m}{M}\)=\(\dfrac{32.5}{65}\)=0.5(mol)

nH₂₍₁₎=\(\dfrac{0.5\times1}{1}\)=0.5(mol)

nH₂₍₂₎=\(\dfrac{0.5\times1}{1}\)=0.5(mol)

nH_2(1,2)=0.5+0.5=1 (mol)

VH₂=1\(\times\)22.4=22.4(l)

nZnCl₂=0.5 (mol)

mZnCl₂=0.5\(\times\)136=68(g)

nFeCl₂=0.5(mol)

mFeCl₂=0.5\(\times\)127=63.5(g)

Zn +2 HCl----> ZnCl2 +H2(1)

Fe +2HCl----> FeCl2 +H2(2)

a) m\(_{Fe}=\)\(\frac{60,5.46,289}{100}=28\left(g\right)\)

m\(_{Zn}=60,5-28=32,5\left(g\right)\)

b) Ta có

n\(_{Fe}=\frac{28}{56}=0,5\left(mol\right)\)

Theo pthh2

n\(_{H2}=n_{Fe}=0,5\left(mol\right)\)

n\(_{Zn}=\frac{32,5}{65}=0,5\left(mol\right)\)

Theo pthh1

n\(_{H2}=n_{Zn}=0,5\left(mol\right)\)

ϵ n\(_{H2}=0,5+0,5=1\left(mol\right)\)

V\(_{H2}=1.22,4-22,4\left(l\right)\)

c) Theo pthh1

n\(_{ZnCl2}=n_{Zn}=0,5\left(mol\right)\)

m\(_{ZnCl2}=0,5.136=68\left(g\right)\)

Theo pthh2

n\(_{FeCl2}=n_{Fe}=0,5\left(mol\right)\)

m\(_{FeCl2}=0,5.127=63,5\left(g\right)\)

Chúc bạn học tốt

\(Zn+2HCl--->ZnCl_2+H_2\) \((1)\)

\(Fe+2HCl---> FeCl_2+H_2\) \((2)\)

\(a)\)

\(mFe=\dfrac{60,5.46,289}{100}=28(g)\)

\(=> nFe=\dfrac{28}{56}=0,5(mol)\)

\(=> mZn=60,5-28=32,5(g)\)

\(=> nZn=\dfrac{32,5}{65}=0,5(mol)\)

\(b)\)

Theo PTHH (1) và (2) \(nH_2=0,5+0,5=1(mol)\)

\(=> VH_2(đktc)=1.22,4=22,4(l)\)

\(c)\)

Theo (1) \(nZnCl_2=nZn=0,5(mol)\)

\(=> mZnCl_2=0,5.136=68(g)\)

Theo (2) \(nFeCl_2=nFe=0,5(mol)\)

\(=> mFeCl_2=0,5.127=63,5(g)\)

Gọi số mol Zn, AL là a, b (mol)

=> 65a + 27b = 3,79 (1)

\(n_{H_2}=\dfrac{1,792}{22,4}=0,08\left(mol\right)\) 

PTHH: Zn + H₂SO₄ --> ZnSO₄ + H₂

            a---->a------------------->a

            2Al + 3H₂SO₄ --> Al₂(SO₄)₃ + 3H₂

             b---->1,5b-------------------->1,5b

=> a + 1,5b = 0,08 (2)

(1)(2) => a = 0,05; b = 0,02

=> \(\left\{{}\begin{matrix}\%m_{Zn}=\dfrac{0,05.65}{3,79}.100\%=85,752\%\\\%m_{Al}=\dfrac{0,02.27}{3,79}.100\%=14,248\%\end{matrix}\right.\)

\(n_{H_2SO_4}=a+1,5b=0,08\left(mol\right)\)

=> \(m_{H_2SO_4}=0,08.98=7,84\left(g\right)\)

Zn + H2SO4 -> ZnSO4 + H2

a -> a

2Al + 3H2SO4 -> Al2(SO4)3 + 3H2

b -> 1.5b

HPT: 65a+27b=3.79

a + 1.5b = 1.792/22.4= 0.08

Giải HPT ta được a=0.05 b=0.02
mZn = 0.05*65=3.25 (g)

mAl= 0.02*27=0.54 (g)

\(\left\{{}\begin{matrix}n_{Zn}=x\left(mol\right)\\n_{Al}=y\left(mol\right)\end{matrix}\right.\) \(\Rightarrow65x+27y=3,79\left(1\right)\)

\(n_{H_2}=\dfrac{1,792}{22,4}=0,08\)

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

x        x                                x

\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

y          1,5y                                 1,5y

\(\Rightarrow x+1,5y=0,08\left(2\right)\)

Từ \(\left(1\right),\left(2\right)\Rightarrow\left\{{}\begin{matrix}x=0,05\\y=0,02\end{matrix}\right.\)

\(\%m_{Zn}=\dfrac{0,05\cdot65}{3,79}\cdot100\%=85,75\%\)

\(\%m_{Al}=100\%-85,75\%=14,25\%\)

\(\Sigma n_{H_2SO_4}=x+1,5y=0,05+1,5\cdot0,02=0,08mol\)

\(\Rightarrow m_{H_2SO_4}=0,08\cdot98=7,84g\)

Zn+2HCl−−−>ZnCl2+H2 (1)

Fe+2HCl−−−>FeCl2+H2(2)

a)

mFe=60,5.46,289/100=28(g)

=>nFe=28/56=0,5(mol)

=>mZn=60,5−28=32,5(g)

=>nZn=32,5/65=0,5(mol)

b)

Theo PTHH (1) và (2) nH2=0,5+0,5=1(mol)

=>VH2(đktc)=1.22,4=22,4(l)

c)

Theo (1) nZnCl2=nZn=0,5(mol)

=>mZnCl2=0,5.136=68(g)

Theo (2) nFeCl2=nFe=0,5(mol)

=>mFeCl2=0,5.127=63,5(g)

a) Ta có: m_Fe = \(\dfrac{60,5.49,289}{100}\approx28\left(g\right)\)

⇒
mZn = 60,5 - 28 = 32,5g

b) PTPỨ: Zn + 2HCl →→ ZnCl2 + H2 (1)

Fe + 2HCl →→ FeCl2 + H2 (2)

Theo ptr (1): nH2 (1) = nZn = \(\dfrac{32,5}{65}=0,5\left(mol\right)\)

Theo ptr (2) : n H2 (2) = nFe = \(\dfrac{28}{56}=0,5\left(mol\right)\)

⇒VH2 = (nH2 (1) + nH2 (2) ) . 22,4 = (0,5 + 0,5).22,4=22,4 lít

c) Theo (1): nZnCl2 = nZn = 0,5 mol

⇒⇒ mZnCl2 = 0,5.136 = 68(g)

Theo (2): nFeCl2 = nFe = 0,5 mol

⇒
mFeCl2 = 0,5 . 127 = 63,5 g

a, \(2CH_3COOH+Zn\rightarrow\left(CH_3COO\right)_2Zn+H_2\)

b, \(n_{CH_3COOH}=0,1.2=0,2\left(mol\right)\)

Theo PT: \(n_{H_2}=\dfrac{1}{2}n_{CH_3COOH}=0,1\left(mol\right)\)

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

c, Theo PT: \(n_{Zn}=\dfrac{1}{2}n_{CH_3COOH}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{Zn}=\dfrac{0,1.65}{9,5}.100\%\approx68,42\%\\\%m_{Cu}\approx31,58\%\end{matrix}\right.\)

PTHH: Zn + H2SO4 -> ZnSO4+ H2

nH2= 0,1(mol) -> nZn=nH2=0,1(mol)

=> mZn=0,1.65=6,5(g)

=> %mZn=(6,5/10).100=65%

=> %mCu=100% - 65%= 35%