a) Fe+Cl3\(\rightarrow\)FeCl3

FeCl3+3NaOH\(\rightarrow\) Fe(OH)3\(\downarrow\)+3NaCl

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

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

Fe+2HCl\(\rightarrow\) FeCl2+H2

b)2Mg+O2\(\underrightarrow{t^0}\) 2MgO

MgO+H2SO4\(\rightarrow\) MgSO4+H2O

MgSO4+Ba(NO3)2\(\rightarrow\) BaSO4\(\downarrow\) Mg(NO3)2

Mg(NO3)2+2NaOH\(\rightarrow\) Mg(OH)2\(\downarrow\) 2NaNO3

Mg(OH)2+2HCl\(\rightarrow\) MgCl2+2H2O

c) ý này giống ý b thôi bạn.

Chúc bạn học tốt!

a.

2Al2O3 \(\underrightarrow{t^o}\)4Al + 3O2\(\uparrow\)

Al + 6HNO3 \(\rightarrow\) Al(NO3)3\(\downarrow\) + 3NO2 + 3H2O

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

2Al(OH)3 \(\xrightarrow[criolit]{đpnc}\) Al2O3 + 3H2O

Al2O3 + 3H2SO4 \(\rightarrow\) Al2(SO4)3 + 3H2O

Al2(SO4)3 + 3BaCl2 \(\rightarrow\) 3BaSO4\(\downarrow\) + 2AlCl3

2AlCl3 \(\xrightarrow[criolit]{đpnc}\) 2Al + 3Cl2\(\uparrow\)

2Al + 3CuSO4 \(\rightarrow\) 3Cu + Al2(SO4)3

C.

a)

4Al + 3O2\(\rightarrow\) 2Al2O3

Al2O3 +6HNO3\(\rightarrow\) 2Al(NO3)3 + 3H2O

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

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

Al2O3 +6HCl \(\rightarrow\) 2AlCl3 + 3H2O

AlCl3 không điện phân nóng chảy được \(\rightarrow\) Al2O3 \(\underrightarrow{^{\text{đpnc}}}\)2Al + \(\frac{3}{2}\)O2

b) 2Fe + 3Cl2 \(\rightarrow\) 2FeCl3

FeCl3 + 3NaOH \(\rightarrow\)Fe(OH)3 + 3NaCl

2Fe(OH)3\(\rightarrow\)Fe2O3 + 3H2O

Fe2O3 + 3CO \(\rightarrow\)2Fe + 3CO2

Fe + 2HCl\(\rightarrow\) FeCl2 + 2

FeCl2 + 2AgNO3\(\rightarrow\)Fe(NO3)2 + 2AgCl (thường ra Fe⁺³ )

c) 2Mg + O2\(\rightarrow\)2MgO

MgO + 2HCl \(\rightarrow\) MgCl2 + H2O

MgCl2 + 2NaOH \(\rightarrow\) Mg(OH)2 + 2NaCl

Mg(OH)2 + H2SO4 \(\rightarrow\)MgSO4 + 2H2O

MgSO4 + BaCl2 \(\rightarrow\) MgCl2 + BaSO4

d) Cu(OH)2\(\underrightarrow{^{to}}\) CuO + H2O

CuO + H2SO4\(\rightarrow\)CuSo4 + H2O

CuSO4 + BaCl2 \(\rightarrow\) BaSO4 + CuCl2

CuCl2 + 2AgNO3 \(\rightarrow\) Cu(NO3)2 + 2AgCl

Fe + Cu(NO3)2\(\rightarrow\) Fe(NO3)2 + Cu

Cu + \(\frac{1}{2}\)O2 \(\rightarrow\) CuO

e) 4Na + O2\(\rightarrow\) 2Na2O

Na2O + H2O \(\rightarrow\) 2NaOH

2NaOH + CO2 \(\rightarrow\)Na2CO3 + H2O

Na2CO3 + H2SO4\(\rightarrow\) Na2SO4 + CO2 + H2O

Na2SO4 + BaCl2 \(\rightarrow\)BaSO4 + 2NaCl

NaCl + AgNO3\(\rightarrow\) AgCl + NaNO3

f) Fe3O4 + 4CO\(\rightarrow\) 3Fe + 4CO2

2Fe + 3Cl2 \(\rightarrow\)2FeCl3

FeCl3 + 3AgNO3 \(\rightarrow\) Fe(NO3)3 +3AgCl

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

Lần sau đăng tách riêng ra nhé

Nhìn rối mắt lắm

a) Al -> Al₂O₃-> Al(NO₃)₃-> Al(OH)₃ -> Al₂O₃ -> AlCl₃ -> Al

(1) 2A1 + O₂ Al₂O₃

(2) Al₂O₃ + 6HCl → 2AlCl₃ + 3H₂O

(3) Al(NO₃)₃ + 3NaOH (vừa đủ) → 3NaNO₃ + Al (OH)₃

(4) 2Al(OH)₃ Al₂O₃+ ЗН₂О

(5) 2Al₂O₃ 4Al + 3O₂

(6) 2Al + 3Cl₂ 2AlCl₃

b) Fe -> FeCl₃ -> Fe(OH)₃ -> Fe₂O₃-> Fe -> FeCl₂ -> Fe(NO₃)₃

(1) 2Fe + 3Cl₂ → 2FeCl₃

(2) FeCl₃ + 3NaOH → 3NaCl + Fe(OH)₃

(3) 2Fe(OH)₃ → Fe₂O₃ + 3H₂O

(4) Fe₂O₃ + H₂→ Fe + H₂O

(5) 3Fe + 2HCl → 2FeCl₂ +H_2↑

(6) Fe(NO₃)₃+3NaOH ➞Fe(OH)₃ +3Na(NO₃)

dài wá mình trả lời những câu còn lại sau : thông cảm cho mk nha❗❕

a/

b/

a)c+o2->co2

co2+ca(oh)2->caco3 +h2o

caco3+ba(oh)2->CA(OH)2+baco3

co2+ca(oh)2->caco3 +h2o

caco3+bacl2->cacl2+baco3

tui để em tui làm thử coi sao nó mới vào lớp 8

.sai cứ nói nhé

1)\(Mg\left(OH\right)_2\underrightarrow{t^o}MgO+H_2O\)

2)\(MgO+H_2SO_4\rightarrow MgSO_4+H_2O\)

3)\(MgSO_4+BaCl_2\rightarrow MgCl_2+BaSO_4\downarrow\)

4)\(MgCl_2+2AgNO_3\rightarrow Mg\left(NO_3\right)_2+2AgCl\downarrow\)

5)\(MgSO_4+Ba\left(OH\right)_2\rightarrow BaSO_4\downarrow+Mg\left(OH\right)_2\downarrow\)

\(a)C+O_2\xrightarrow[]{t^0}CO_2\\ CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\\ Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+CO_2+H_2O\\ b)FeSO_4+BaCl_2\rightarrow FeCl_2+BaSO_4\\ FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\\ Fe\left(OH\right)_2\xrightarrow[]{t^0}FeO+H_2\\ c)2Mg+O_2\xrightarrow[]{t^0}2MgO\\ MgO+H_2SO_4\rightarrow MgSO_4+H_2O\\ MgSO_4+BaCl_2\rightarrow MgCl_2+BaSO_4\)

Bài 4,7,8 đang lỗi text ,em xem lại

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