a) Fe → FeCl3 → Fe(OH)3 → Fe2O3 → Fe2(SO4)3 → Fe(OH)3
b) 2Fe + 3Cl2 -to-> 2FeCl3
2FeCl3 + 6NaOH --->2Fe(OH)3 + 6NaCl
2Fe(OH)3 --to-> Fe2O3 + 3H2O
Fe2O3 + 3H2SO4 --->Fe2(SO4)3 + 3H2O
Fe2(SO4)3 | + | 6KOH | → | 3K2SO4 | + | 2Fe(OH)3 |
a) Fe \(\underrightarrow{1}\) FeCl3 \(\underrightarrow{2}\) Fe(OH)3 \(\underrightarrow{3}\) Fe2O3 \(\underrightarrow{4}\) Fe2(SO4)3
b) PTHH:
1) 2Fe + 3Cl2 \(\underrightarrow{to}\) 2FeCl3
2) FeCl3 + 3NaOH → 3NaCl + Fe(OH)3↓
3) 2Fe(OH)3 \(\underrightarrow{to}\) Fe2O3 + 3H2O
4) Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O