a) Fe =>FeCl3=>Fe(OH)3=>Fe2O3=>Fe2(SO4)=>3FeCl3 =>AgCl b) Al=>AlCl3=>Al(OH)3 =>Al2O3 =>Al2(SO4)3=>AlCl3 =>AgCl
2 câu trả lời
a)
- 2Fe+`3Cl_2`$\xrightarrow[]{t^o}$`2FeCl_3`
- `FeCl_3`+3NaOH→`Fe(OH)_3`+3NaCl
- `2Fe(OH)_3`$\xrightarrow[]{t^o}$`Fe_2``O_3`+`3H_2O`
- `Fe_2``O_3`+`3H_2``SO_4`→`Fe_2(SO_4)_3`+`3H_2O`
- `Fe_2(SO_4)_3`+`3BaCl_2`→`3BaSO_4↓`+`2FeCl_3`
- `FeCl_3`+`3AgNO_3`→`Fe(NO_3)_3`+`3AgCl↓`
b)
- 2Al+`3Cl_2`$\xrightarrow[]{t^o}$`2AlCl_3`
- `AlCl_3`+3NaOH→`Al(OH)_3`+`3NaCl`
- `2Al(OH)_3`$\xrightarrow[]{t^o}$`Al_2``O_3`+`3H_2O`
- `Al_2``O_3`+`3H_2``SO_4`→`Al_2(SO_4)_3`+`3H_2O`
- `Al_2(SO_4)_3`+`3BaCl_2`→`3BaSO_4↓`+`2AlCl_3`
- `AlCl_3`+`3AgNO_3`→`Al(NO_3)_3`+`3AgCl↓`
Đáp án + Giải thích các bước giải:
$a)$
$(1)$ $2Fe+3Cl_2\xrightarrow[]{t^o} 2FeCl_3$
$(2)$ $FeCl_3+3NaOH→Fe(OH)_3↓+3NaCl$
$(3)$ $2Fe(OH)_3\xrightarrow[]{t^o} Fe_2O_3+3H_2O$
$(4)$ $Fe_2O_3+3H_2SO_4→Fe_2(SO_4)_3+3H_2O$
$(5)$ $Fe_2(SO_4)_3+3BaCl_2→3BaSO_4↓+2FeCl_3$
$(6)$ $FeCl_3+3AgNO_3→3AgCl↓+Fe(NO_3)_3$
$b)$
$(1)$ $2Al+3Cl_2\xrightarrow[]{t^o} 2AlCl_3$
$(2)$ $AlCl_3+3NaOH→Al(OH)_3↓+3NaCl$
$(3)$ $2Al(OH)_3\xrightarrow[]{t^o} Al_2O_3+3H_2O$
$(4)$ $Al_2O_3+3H_2SO_4→Al_2(SO_4)_3+3H_2O$
$(5)$ $Al_2(SO_4)_3+3BaCl_2→3BaSO_4↓+2AlCl_3$
$(6)$ $AlCl_3+3AgNO_3→3AgCl↓+Al(NO_3)_3$