Oxit bazo : \(CaO,Na_2O\)

Oxit axit : \(SO_2,SO_3,N_2O_5\)

Axit : \(HNO_3,HNO_2\)

Bazo : \(Fe(OH)_3,Al(OH)_3\)

Muối : \(FeS,CaSO_3,KHCO_3,FeHPO_4,Fe(NO_3)_2,Fe(NO_3)_3,NaH_2PO_4,Na_2HPO_4\)

\(\text{Oxit axit : }\) \(SO_2,SO_3,N_2O_5\)

\(\text{Oxit bazo : }\)\(CaO,Na_2O\)

\(\text{Axit : }\)\(HNO_3,HNO_2\)

\(\text{Bazo : }\)\(Fe\left(OH\right)_3,Al\left(OH\right)_3\)

\(\text{Muối : }\) \(FeS,CaSO_3,KHCO_3,FeHPO_4,Fe\left(NO_3\right)_2,Fe\left(NO_3\right)_3,NaH_2PO_4,NaHPO_4\)

Fe →⁽¹⁾ Fe2(SO4)3 →⁽²⁾ Fe(OH)3 →⁽³⁾ Fe2O3 →⁽⁴⁾ Fe(NO3)3

(1) 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

(2) Fe2(SO4)3 + 6NaOH -> 3Na2SO4 + 2Fe(OH)3

(3) 2Fe(OH)3 →^t○ Fe2O3 + 3H2O

(4) Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O

Đáp án C

Ví dụ : $NaOH + HCl \to NaCl + H_2O$

C.NaOH

Chất được sử dụng để trung hòa axit là: 

A. $Al{}^{}$

B. $Fe{}^{}$

C. NaOH

D. $Cu{}^{}$

1) Al\(_2\)(SO\(_4\))\(_3\)+3BaCl\(_2\)→2AlCl\(_3\)+3BaSO\(_4\)↓

2)AlCl\(_3\)+3AgNO\(_3\)→Al(NO\(_3\))\(_3\)+3AgCl↓

3)Al(NO\(_3\))\(_3\)+3NaOH→Al(OH)\(_3\)+3NaNO\(_3\)

4)2Al(OH)\(_3\)\(\underrightarrow{to}\)Al₂O₃+3H₂O

5)2Al₂O₃\(\xrightarrow[criolit]{đpnc}\)4Al+3O₂

a)\(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

   \(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

   \(2AlCl_3+3Ba\left(OH\right)_2\rightarrow2Al\left(OH\right)_3\downarrow+3BaCl_2\)

   \(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

   \(2Al+3S\underrightarrow{t^o}Al_2S_3\)

(1) 2Al(OH)3--^to--->Al2O3+3H2O

(2) 2Al2O3---dpnc-->4Al+3O2

(3) 2Al+6H2SO4--^to-->Al2(SO4)3+6H2O+3SO2

(4) Al2(SO4)3+3BaCl2---->2AlCl3+3BaSO4

Chất thứ 2 trong sơ đồ phải là Al₂O₃ bạn nhé!

\(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

\(2Al_2O_3\underrightarrow{đpnc}4Al+3O_2\)

\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

\(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_{4\downarrow}\)

Bạn tham khảo nhé!

1, (1) 4Al+ 3O2--(to)---> 2Al2O3

(2) Al2O3+6HCl---> 2AlCl3+ 3H2O

(3) AlCl3+3NaOH---->Al(OH)3+ 3NaCl

(4) 2Al(OH)3---(t^o)---> Al2O3+ 3H2O

(5)2Al2O3---(t^o+ đpnc)--> 4Al+ 3O2

(6) 2Al+ 3Cl2---> 2AlCl3

2, (1)Fe+ CuSO4-->Cu+ FeSO4

(2) FeSO4+ 2NaOH--> Fe(OH)2+ Na2SO4

(3) Fe(OH)2 +2HCl---> FeCl2+ 2H2O

Bài cuối tự làm nhé!

câu 3

2Al + 3Cl2 --t--> 2AlCl3

AlCl3 + 3NaOH -> 3NaCl + Al(OH)3

2Al(OH)3 -t-> Al2O3 + H2O

Al2O3 + 3H2SO4 -> Al2(SO4)3 + 3H2O

Al2(SO4)3 + 3BaCl2 -> 3BaSO4 + 2AlCl3

2AlCl3 + 3Mg -> 2Al + 3MgCl2

\(\left(1\right)4Al+3O_2\underrightarrow{t^o}2Al_2O_3\\ \left(2\right)Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\\ AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3\downarrow+3NaCl\\ 2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\\ 2Al_2O_3\underrightarrow{dpnc}4Al+3O_2\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\)

$\text{CTHH sai : Sửa lại }$

$C_2O$ $\text{: CO hoặc}$ $CO_2$

$NaO : Na_2O$

$Ca_2O : CaO$

$Zn_2O : ZnO$

$Al_2O : Al_2O_3$

$Al(SO_4)_3 : Al_2(SO_4)_3$

$Zn(OH)_3 : Zn(OH)_2$