Question

hoàn thành các chuỗi phản ứng sau

1,\(FeCl_3\rightarrow Fe\left(OH\right)_3\rightarrow Fe_2O_3\rightarrow Fe\rightarrow Fe_3O_4\)

2,\(Ca\rightarrow CaO\rightarrow Ca\left(OH\right)_2\rightarrow CaCO_3\rightarrow Ca\left(HCO_3\right)_2\rightarrow CaCl_2\rightarrow CaO\)

3,\(FeS\rightarrow Fe_2O_3\rightarrow Fe\left(NO_3\right)_3\rightarrow Fe\left(OH\right)_3\rightarrow Fe_2O_3\rightarrow Fe\rightarrow FeS\)

Answer 1

Bài 3 :

4FeS + 7O2 --t--> 2Fe2O3 + 4SO2

Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O

Fe(NO3)3 + 3 NaOH -> Fe(OH)3 +3NaNO3

2Fe(OH)3 --t--> Fe2O3 + 3H2O

Fe2O3 + 3H2 -t-> 2Fe + 3H2O

Fe + S -t-> FeS

Answer 2

1, FeCl₃ + 3KOH → Fe(OH)₃ + 3KCl

2Fe(OH)₃ \(\underrightarrow{t^o}\)Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂ \(\underrightarrow{t^o}\) 2Fe + 3H₂O

3Fe + 2O₂ \(\underrightarrow{t^o}\) Fe₃O₄

2, 2Ca + O₂ \(\underrightarrow{t^o}\) 2CaO

CaO + H₂O → Ca(OH)₂

Ca(OH)₂ + CO₂ → CaCO₃ + H₂O

CaCO₃ + H₂O + CO₂→ Ca(HCO₃)₂

Ca(HCO₃)₂ + 2HCl → CaCl₂ + 2H₂O + 2CO₂

CaCl₂ + Ca(OH)₂ → 2CaO + 2HCl

3, 4FeS + 7O₂ \(\underrightarrow{t^o}\) 2Fe₂O₃ + 4SO₂

Fe₂O₃ + 6HNO₃ → 2Fe(NO₃)₃ + 3H₂O

Fe(NO₃)₃ + 3KOH → Fe(OH)₃ + 3KNO₃

2Fe(OH)₃ \(\underrightarrow{t^o}\) Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂ \(\underrightarrow{t^o}\) 2Fe + 3H₂O

Fe + S \(\underrightarrow{t^o}\) FeS

Answer 3

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\2 Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\rightarrow2Fe+3CO_2\\3 Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(Ca+\frac{1}{2}O_2\underrightarrow{t^o}CaO\\ CaO+H_2O\rightarrow Ca\left(OH\right)_2\\ Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ CaCO_3+H_2O+CO_2\rightarrow Ca\left(HCO_3\right)_2\\ Ca\left(HCO_3\right)+2HCl\rightarrow CaCl_2+2H_2O+2CO_2\\ CaCl_2+Ca\left(OH\right)_2\rightarrow2CaO+2HCl\)

\(4FeS+7O_2\underrightarrow{t^o}2Fe_2O_3+4SO_2\\ Fe_2O_3+HNO_3\rightarrow Fe\left(NO_3\right)_3+H_2O\\ Fe\left(NO_3\right)_3+3NaOH\rightarrow3NaNO_3+Fe\left(OH\right)_3\\ 2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\\ Fe+S\underrightarrow{t^o}FeS\)

Answer 4

https://i.imgur.com/rYi5wki.jpg

Answer 5

Bài 1 :

2Fe + 3Cl2 -> 2FeCl3

FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl

2Fe(OH)3 -> Fe2O3 + H2O

Fe2O3 + 3H2 -t-> 2Fe + 3H2O

3Fe + 2O2 -t-> Fe3O4

Answer 6

Bài 2

2Ca + O2 -t-> 2CaO

CaO + H2O -> Ca(OH)2

Ca(OH)2 + CO2 -> CaCO3 + H2O

CaCO3 + CO2 + H2O -> Ca(HCO3)2

Ca(HCO3)2 + 2HCl -> CaCl2 + 2CO2+2H2O

cái từ CaCl2 -> CaO thì mình không biết nhé :)) nhìn lạ :))