Question

Tìm cách điều chế:

\(Na_2CO_3\rightarrow Na\)

\(Al\left(NO_3\right)_3\rightarrow Al\)

\(FeS_2\rightarrow Fe\)

Answer 1

* Na₂CO₃ \(\rightarrow\) Na

PTHH :

Na₂CO₃ + 2HCl \(\rightarrow\) 2NaCl + H₂O + CO₂ \(\uparrow\)

2NaCl \(\underrightarrow{đpnc}\) 2Na + Cl₂ ( đpnc : điện phân nóng chảy)

* Al(NO₃)₃ \(\rightarrow\) Al

PTHH :

Al(NO₃)₃ + 3NaOH \(\rightarrow\) 3NaNO₃ + Al(OH)₃

2Al(OH)₃ \(\underrightarrow{t^o}\) Al₂O₃ + 3H₂O

* FeS₂ \(\rightarrow\) Fe

PTHH:

4FeS₂ + 11O₂ \(\underrightarrow{t^o}\) 2Fe₂O₃ + 8SO₂

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