Question

Viết các PTHH theo chuỗi pứ

Fe2O3 -⁽¹⁾->Fe\(\left[{}\begin{matrix}-^{\left(2\right)}>FeCl2-^{\left(3\right)}>Fe\left(OH\right)2-^{\left(4\right)}>FeSO4\\\\-^{\left(5\right)}>FeCl3-^{\left(6\right)}>Fe\left(OH\right)3-^{\left(7\right)}>Fe2O3\end{matrix}\right.\)

Answer 1

Fe2O3+3H2->2Fe+3H2O

Fe+2HCl->FeCl2+H2

FeCl2+2NaOH->Fe(OH)2+2NaCl

Fe(OH)2+MgSO4->FeSO4+Mg(OH)2

2FeCl2+Cl2->2FeCl3

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

2Fe(OH)3->Fe2O3+H2O

Answer 2

Viết các PTHH theo chuỗi phản ứng.

\(\left(1\right)Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\)

\(\left(2\right)Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

\(\left(3\right)FeCl_2+Ba\left(OH\right)_2\rightarrow Fe\left(OH\right)_2\downarrow+BaCl_2\)

\(\left(4\right)Fe\left(OH\right)_2+H_2SO_4\rightarrow FeSO_4+2H_2O\)

\(\left(5\right)2Fe+3Cl_2\rightarrow2FeCl_3\)

\(\left(6\right)FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\)

\(\left(7\right)2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)