hoàn thành sơ đồ phản ứng
Fe-> FeCl3-> Fe(OH)3-> Fe2O3-> Fe
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(3Fe + 2O_2 \xrightarrow{t^o} Fe_3O_4\\ Fe_3O_4 + 8HCl \to 2FeCl_3 + FeCl_2 + 4H_2O\\ FeCl_2 + 2KOH \to Fe(OH)_2 + 2KCl\\ 2Fe(OH)_2 + \dfrac{1}{2}O_2 + H_2O \to 2Fe(OH)_3\\ 2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O\)
(1) 4 Na + O2 -to-> 2 Na2O
(2) Na2O + H2O -> 2 NaOH
(3) 3 NaOH + FeCl3 -> 3 NaCl + Fe(OH)3
(4) 2 Fe(OH)3 -to-> Fe2O3 + 3 H2O
(5) Fe2O3 + 3 CO -to-> 2 Fe + 3 CO2
(6) 2 Fe + 3 Cl2 -to-> 2 FeCl3
\(\left(1\right)Fe+\frac{1}{2}O_2\underrightarrow{t^o}FeO\\ \left(2\right)FeO+2HCl\rightarrow FeCl_2+H_2O\\ \left(3\right)FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\\ \left(4\right)4Fe\left(OH\right)_2+O_2\underrightarrow{t^o}2Fe_2O_3+4H_2O\\ \left(5\right)Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\\ \left(6\right)FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
2Fe + O2---->2FeO
FeO +2HCl------>FeCl2+H2O
FeCl2 + 2NaOH-----> Fe(OH)2 +2NaCl
4Fe(OH)2 +O2----->2Fe2O3+4H2O
Fe2O3+6HCl----->2FeCl3 +3H2O
FeCl3+3NaOH---->Fe(OH)3 +3NaCl
Chúc bạn học tốt
\(a.\)
\(NaCl+H_2SO_4\underrightarrow{t^0}NaHSO_4+HCl\)
\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
\(Fe+\dfrac{3}{2}Cl_2\underrightarrow{t^0}FeCl_3\)
\(2FeCl_3+Fe\rightarrow3FeCl_2\)
\(FeCl_2\underrightarrow{đpdd}Fe+Cl_2\)
\(Fe+2AgNO_3\rightarrow Fe\left(NO_3\right)_2+2Ag\)
\(b.\)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_2+3NaCl\)
\(2Fe\left(OH\right)_2+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
\(Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\)
Đáp án B
Các phản ứng oxi hóa khử gồm : (1), (3), (5), (6)
\(a) 2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O\\ Fe_2O_3 + 3CO \xrightarrow{t^o} 2Fe + 3CO_2\\ 2Fe + 3Cl_2 \xrightarrow{t^o} 2FeCl_3\\ 2FeCl_3 + Fe \rightarrow 3FeCl_2\)
\(b) 6nCO_2 + 5nH_2O \xrightarrow[\text{chất diệp lục}]{\text{ánh sáng}} (-C_6H_{10}O_5-)_n + 6nO_2\\ (-C_6H_{10}O_5-)_n + nH_2O \xrightarrow{axit} nC_6H_{12}O_6\\ C_6H_{12}O_6 \xrightarrow{\text{men rượu}} 2CO_2 + 2C_2H_5OH\\ C_2H_5OH + O_2 \xrightarrow{\text{men giấm}} CH_3COOH + H_2O\)
\(2Fe+3Cl_2\rightarrow\left(t^o\right)2FeCl_3\\ FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\\ 2Fe\left(OH\right)_3\rightarrow\left(t^o\right)Fe_2O_3+3H_2O\\ Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
2Fe+3Cl2→(to)2FeCl3
FeCl3+3KOH→Fe(OH)3+3KCl2
Fe(OH)3→(to)Fe2O3+3H2O
Fe2O3+6HCl→2FeCl3+3H2O
`a)`
`FeCl_3 + 3KOH -> Fe(OH)_3 + 3KCl`
`2Fe(OH)_3 -> (t^o) Fe_2O_3 + 3H_2O`
`Fe_2O_3 + 3CO -> (t^o) 2Fe + 3CO_2`
`3Fe + 2O_2 -> (t^o) Fe_3O_4`
`b)`
`2Al + 6HCl -> 2AlCl_3 + 3H_2O`
`AlCl_3 + 3KOH -> Al(OH)_3 + 3KCl`
`2Al(OH)_3 -> (t^o) Al_2O_3 + 3H_2O`
`2Al_2O_3 -> (đpnc, Criolit) 4Al + 3O_2`
\(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
\(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_{3\downarrow}\)
\(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
\(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
\(2Fe+3Cl_2\rightarrow2FeCl_3\)
\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)
\(Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)