Cho hỗn hợp X gồm Al, Fe vào dung dịch chứa AgNO

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

\(X\left\{ \matrix{ Al \hfill \cr Fe \hfill \cr} \right. + \left\{ \matrix{ AgN{O_3} \hfill \cr Cu{(N{O_3})_2} \hfill \cr} \right. \to \left\{ \matrix{ Ran\,Y\left\{ \matrix{ Ag \hfill \cr Cu \hfill \cr} \right. \hfill \cr {\rm{dd}}\,Z\left\{ \matrix{ Al{(N{O_3})_3} \hfill \cr Fe{(N{O_3})_2} \hfill \cr Cu{(N{O_3})_2} \hfill \cr} \right.\buildrel { + NaOH\,du} \over \longrightarrow \downarrow \left\{ \matrix{ Fe{(OH)_2} \hfill \cr Cu{(OH)_2} \hfill \cr} \right. \hfill \cr} \right.\)

Pt:

Al + 3AgNO₃ → Al(NO₃)₃ + 3Ag↓

2Al + 3Cu(NO₃)₂ → 2Al(NO₃)₂ + 3Cu↓

Fe + 2AgNO₃ → Fe(NO₃)₂ + 2Ag↓

Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu↓

Al(NO₃)₃ + 3NaOH → Al(OH)₃↓ + 3NaNO₃

Al(OH)₃ + NaOH → NaAlO₂ + 2H₂O

Fe(NO₃)₂ + 2NaOH → Fe(OH)₂↓ + 2NaNO₃

Cu(NO₃)₂ + 2NaOH → Cu(OH)₂↓ + 2NaNO₃