Hỗn hợp oxit gì của Fe thế em

a) Gọi \(n_{Cu}=a\left(mol\right)\rightarrow n_{Fe}=\dfrac{3}{2}a=1,5a\left(mol\right)\)

PTHH: 

\(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\)

a<------a<------a

\(Fe_3O_4+4H_2\xrightarrow[]{t^o}3Fe+4H_2O\)

0,5a<-----2a<------1,5a

\(\rightarrow80a+0,5a.232=39,2\\ \Leftrightarrow a=0,2\left(mol\right)\)

\(\rightarrow\left\{{}\begin{matrix}m_{CuO}=0,2.80=16\left(g\right)\\m_{Fe_3O_4}=0,5.0,2.232=23,2\left(g\right)\end{matrix}\right.\)

b) \(V_{H_2}=\left(0,2.2+0,2\right).22,4=13,44\left(l\right)\)

\(m_{Cu}=\dfrac{29,6-4}{2}=12,8(g)\\ \Rightarrow m_{Fe}=12,8+4=16,8(g)\\ PTHH:CuO+H_2\xrightarrow{t^o}Cu+H_2O\\ Fe_3O_4+4H_2\xrightarrow{t^o}3Fe+4H_2O\\ \Rightarrow \Sigma n_{H_2}=n_{Cu}+3n_{Fe}=\dfrac{12,8}{64}+\dfrac{3}{4}.\dfrac{16,8}{56}=0,6(mol)\\ \Rightarrow V_{H_2}=0,6.22,4=13,44(l)\)

Ta có: \(\left\{{}\begin{matrix}m_{Fe}=\dfrac{59,2+8}{2}=33,6\left(g\right)\\m_{Cu}=59,2-33,6=25,6\left(g\right)\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}n_{Fe}=\dfrac{33,6}{56}=0,6\left(mol\right)\\n_{Cu}=\dfrac{25,6}{64}=0,4\left(mol\right)\end{matrix}\right.\)

PTHH:
\(Fe_3O_4+4H_2\xrightarrow[]{t^o}3Fe+4H_2O\)

              0,8<----0,3

\(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\)

          0,4<---0,4

`=> V_{H_2} = (0,4 + 0,8).22,4 = 26,88 (l)`

a) Đặt \(n_{Cu}=a\left(mol\right)\)

\(\rightarrow n_{Fe}=1,5a\left(mol\right)\)

PTHH:

\(Fe_3O_4+4H_2\xrightarrow[]{t^o}3Fe+4H_2O\)

0,5a<---2a<------1,5a

\(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\)

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

Theo bài ra, ta có PT: \(0,5a.232+80a=39,2\)

\(\Leftrightarrow a=0,2\left(mol\right)\)

\(\rightarrow\left\{{}\begin{matrix}m_{Fe_3O_4}=0,5.0,2.232=23,2\left(g\right)\\m_{CuO}=0,2.80=16\left(g\right)\end{matrix}\right.\)

b) \(V_{H_2}=\left(0,2.2+0,2\right).22,4=13,44\left(l\right)\)

\(m_{Cu}=12g\Rightarrow n_{Cu}=\dfrac{12}{64}=0,1875mol\)

\(\Rightarrow m_{Fe}=m_{kl}-m_{Cu}=24-12=12g\Rightarrow n_{Fe}=\dfrac{3}{14}mol\)

\(CuO+H_2\rightarrow Cu+H_2O\)

           \(\dfrac{12}{64}\)      \(\dfrac{12}{64}\)

\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)

              \(\dfrac{9}{28}\)         \(\dfrac{3}{14}\)

\(\Rightarrow\Sigma n_{H_2}=\dfrac{12}{64}+\dfrac{9}{28}=\dfrac{57}{112}mol\)

\(\Rightarrow V_{H_2}=\dfrac{57}{112}\cdot22,4=11,4l\)

Ta có: \(m_{Fe}\) + \(m_{Cu}\) = 29,6

hay\(m_{Cu}\) +4 + \(m_{Cu}\) = 29,6

2\(m_{Cu}\) = 25,6

\(m_{Cu}\) =12,8(g)

=> \(m_{Fe}\) = 16,8(g)

Số mol của 12,8 g Cu:

\(\frac{12,8}{64}\)= 0,2(mol)

Số mol của 16,8g Fe:

\(\frac{16,8}{56}\)=0,3(mol)

CO + CuO \(\rightarrow\) Cu + C\(O_2\)

1(mol) 1(mol)

0,2(mol) 0,2(mol)

4CO + \(Fe_3\)\(O_4\) \(\rightarrow\) 3Fe + 4C \(O_2\)

4(mol) 3(mol)

0,4(mol) 0,3(mol)

Thể tích CO cần dùng:

(0,2+0,4).22,4= 13,44(l)

PTHH: Fe₃O₄+4Co->3Fe+4Co₂ (1)

CuO+Co->Cu+Co₂ (2)

Lại có: m_Fe+m_Cu=29,6

m_Fe-m_Cu=4

=>m_Fe=16,8=> n_Fe=0.3mol

m_Cu=12,8g=>n_Cu=0.2mol

Theo PTHH(1)

n_Fe:n_Co= 3:4=> n_Co=0,3.4/3=0,4mol

n_Cu:n_Co= 1:1 => n_Co= 0,2mol

=> n_Co=0,6mol=13,44(l)

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CuO+H₂-->Cu+H₂O ; Fe₃O₄+4H₂--->3Fe+4H₂O

ta có : m_Cu+m_Fe=29,6 (1) ; m_Fe-m_Cu=4 (2)

Từ (1) và (2) suy ra : m_Fe=16,8 g ; m_Cu=12.8 g

n_Cu=0,2 ; n_Fe=0,3

Theo PTHH ta có : n_H2=n_Cu+\(\dfrac{4}{3}\)n_Fe=0,2+0,3*4/3=0,6 mol

V_H2=0,6*22,4=13,44 (lit)

a) PTHH: \(FeO+H_2\underrightarrow{t^o}Fe+H_2O\)  (1)

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

b) Ta có: \(\left\{{}\begin{matrix}n_{FeO}=\dfrac{7,2}{72}=0,1\left(mol\right)\\n_{Fe_2O_3}=\dfrac{23,2-7,2}{160}=0,1\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}n_{H_2\left(1\right)}=0,1\left(mol\right)\\n_{H_2\left(2\right)}=0,3\left(mol\right)\end{matrix}\right.\) \(\Rightarrow V_{H_2}=\left(0,1+0,3\right)\cdot22,4=8,96\left(l\right)\)

c) Ta có: \(n_{H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\) \(\Rightarrow m_{H_2}=0,25\cdot2=0,5\left(g\right)\)

Theo PTHH: \(n_{H_2O}=n_{H_2}=0,25\left(mol\right)\) \(\Rightarrow m_{H_2O}=0,25\cdot18=4,5\left(g\right)\)

Bảo toàn khối lượng: \(m_{oxit}=m_{Fe}+m_{H_2O}-m_{H_2}=15,2\left(g\right)\)