\(a) 4P + 5O_2 \xrightarrow{t^o} 2P_2O_5\\ P_2O_5 + 3H_2O \to 2H_3PO_4\\ b) 2KClO_3 \xrightarrow{t^o} 2KCl + 3O_2\\ S + O_2 \xrightarrow{t^o} SO_2\\ SO_2 + H_2O \to H_2SO_3\\ 2Ca + O_2 \xrightarrow{t^o} 2CaO\\ CaO + H_2O \to Ca(OH)_2\\ Ca(OH)_2 + CO_2 \to CaCO_3 + H_2O\)

Bài 3 :

4FeS + 7O2 --t--> 2Fe2O3 + 4SO2

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

Fe(NO3)3 + 3 NaOH -> Fe(OH)3 +3NaNO3

2Fe(OH)3 --t--> Fe2O3 + 3H2O

Fe2O3 + 3H2 -t-> 2Fe + 3H2O

Fe + S -t-> FeS

1, FeCl₃ + 3KOH → Fe(OH)₃ + 3KCl

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

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

3Fe + 2O₂ \(\underrightarrow{t^o}\) Fe₃O₄

2, 2Ca + O₂ \(\underrightarrow{t^o}\) 2CaO

CaO + H₂O → Ca(OH)₂

Ca(OH)₂ + CO₂ → CaCO₃ + H₂O

CaCO₃ + H₂O + CO₂→ Ca(HCO₃)₂

Ca(HCO₃)₂ + 2HCl → CaCl₂ + 2H₂O + 2CO₂

CaCl₂ + Ca(OH)₂ → 2CaO + 2HCl

3, 4FeS + 7O₂ \(\underrightarrow{t^o}\) 2Fe₂O₃ + 4SO₂

Fe₂O₃ + 6HNO₃ → 2Fe(NO₃)₃ + 3H₂O

Fe(NO₃)₃ + 3KOH → Fe(OH)₃ + 3KNO₃

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

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

Fe + S \(\underrightarrow{t^o}\) FeS

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\2 Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\rightarrow2Fe+3CO_2\\3 Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(Ca+\frac{1}{2}O_2\underrightarrow{t^o}CaO\\ CaO+H_2O\rightarrow Ca\left(OH\right)_2\\ Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ CaCO_3+H_2O+CO_2\rightarrow Ca\left(HCO_3\right)_2\\ Ca\left(HCO_3\right)+2HCl\rightarrow CaCl_2+2H_2O+2CO_2\\ CaCl_2+Ca\left(OH\right)_2\rightarrow2CaO+2HCl\)

\(4FeS+7O_2\underrightarrow{t^o}2Fe_2O_3+4SO_2\\ Fe_2O_3+HNO_3\rightarrow Fe\left(NO_3\right)_3+H_2O\\ Fe\left(NO_3\right)_3+3NaOH\rightarrow3NaNO_3+Fe\left(OH\right)_3\\ 2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\\ Fe+S\underrightarrow{t^o}FeS\)

\(a.\\ \left(1\right)Ca+\frac{1}{2}O_2\underrightarrow{t^o}CaO\\ \left(2\right)CaO+H_2O\rightarrow Ca\left(OH\right)_2\\ b.\\ Ca+2H_2O\rightarrow Ca\left(OH\right)_2+H_2\)

a) 2Ca +O₂----->2CaO

CaO +H₂O----->Ca(OH)₂

b)\(Ca+O_2+H_2O-->Ca\left(OH\right)_2\)

Chúc bạn học tốt

a) 2Ca + O₂ ---> 2CaO

CaO + H₂O ---> Ca(OH)₂

b) Ca + 2H₂O ---> Ca(OH)₂ + H₂

$\mathrm{1)2C}\mathrm{a+O2}\to 2CaO$

$\mathrm{2)CaO+SO2}\to CaS{O}_3$

\(3Ca+2H2O--->Ca\left(OH\right)2+H2\)

$(4)CaSO3+2HNO3\to S{O}_2$+Ca(NO3)2 +H2O

5) Ca(OH)2 + CO2---->CaCO3 +H2O

$(6)SO2+H2O\to H_{2}S{O}_3$

\(7\) ) CaO + CO2--->CaCO3

8) SO3 +H2O--->H2SO4

PTHH (1), (2), (3), (5), (8) đã cân bằng

\(\left(4\right)Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\)

\(\left(6\right)Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

\(\left(7\right)MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(\left(9\right)P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(\left(10\right)2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)

CaO + CO₂ → CaCO₃

CaO + H₂O → Ca(OH)₂

CaCO₃ + H₂O + CO₂ → Ca(HCO₃)₂

Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O

Fe + H₂SO₄ → FeSO₄ + H₂

2Al(OH)₃ + 6HCl → 2AlCl₃ + 6H₂O

MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O

H₂SO₄ + Na₂CO₃ → Na₂SO₄ + CO₂ + H₂O

P₂O₅ + 3H₂O → 2H₃PO₄

2Fe(OH)₃ \(\underrightarrow{to}\) Fe₂O₃ + 3H₂O

\(Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\)

\(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

\(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)

PT còn lại đều cân bằng rồi bạn à

a) SO₂ + Na₂O -> Na₂SO₃

Na₂SO₃ + H₂SO₄ -> Na₂SO₄ + SO₂ + H₂O

Na₂SO₄ + Ba(OH)₂ -> BaSO₄ \(\downarrow\)+ 2NaOH

2NaOH + CO₂ -> Na₂CO₃ + H₂O

b) CaO + CO₂ -> CaCO₃

CaCO₃ \(\rightarrow^{t^o}\) CaO + CO₂

CaO + H₂O -> Ca ( OH)₂

Ca ( OH)₂ + CO₂ -> CaCO₃ + H₂O

CaCO₃ + H₂SO₄ -> CaSO₄ + CO₂ + H₂O

c) 2Fe + 3Cl₂ \(\rightarrow^{t^o}\) 2FeCl₃

FeCl₃ + 3NaOH -> Fe(OH)₃ \(\downarrow\) + 3NaCl

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

Fe₂O₃ + 3H₂SO₄ -> Fe₂(SO₄)₃ + 3H₂O

Fe₂(SO₄)₃ + 3BaCl₂ -> 2FeCl₃ + 3BaSO₄\(\downarrow\)

d) Fe + 2HCl -> FeCl₂ + H₂

FeCl₂ + 2AgNO₃ -> 2AgCl\(\downarrow\) + Fe(NO₃)₂

Fe(NO₃)₂ + 2NaOH -> Fe(OH)₂\(\downarrow\) + 2NaNO₃

Fe(OH)₂ + H₂SO₄ -> FeSO₄ + 2H₂O

a, SO₂ + 2NaOH \(\rightarrow\)Na₂SO₃ + H₂O

Na₂SO₃ + H₂SO₄ \(\rightarrow\)Na₂SO₄ + H₂O + SO₂

Na₂SO₄ + Ba(OH)₂\(\rightarrow\) BaSO₄+ 2 NaOH

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

b, CaO + CO₂\(\rightarrow\) CaCO₃

CaCO₃ -t⁰-> CaO + CO₂

CaO + H₂O \(\rightarrow\)Ca(OH)₂

Ca(OH)₂ + CO₂ \(\rightarrow\)CaCO₃ + H₂O

CaCO₃ + H₂SO₄ \(\rightarrow\)CaSO₄ + H₂O + CO₂

c, 2Fe + 3Cl₂ -t⁰-> 2FeCl₃

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

2Fe(OH)₃ -t⁰-> Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂SO₄ \(\rightarrow\)Fe₂(SO4)₃ + 3H₂O

Fe₂(SO4)₃ + 3BaCl₂ \(\rightarrow\)2FeCl₃ + 3BaSO₄

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

FeCl_{2 +} 2AgNO₃ \(\rightarrow\)Fe(NO₃)₂ + 2AgCl

Fe(NO₃)₂ + 2NaOH \(\rightarrow\)Fe(OH)₂ + 2NaNO₃

Fe(OH)₂ + H₂SO₄\(\rightarrow\) FeSO₄ + 2H₂O

e, 2Cu + O₂ -t⁰-> 2CuO

CuO + 2HCl \(\rightarrow\)CuCl₂ + H₂O

CuCl₂ + 2NaOH\(\rightarrow\) Cu(OH)₂ + 2NaCl

Cu(OH)₂ -t⁰-> CuO + H₂O

CuO + H₂ -t⁰-> Cu + H₂O

Cu + 2H₂SO_4đặc \(\rightarrow\)CuSO₄ + SO₂ + 2H₂O

f, 2Al₂O₃ -đpnc/ criolit-> 4Al + 3O₂

2Al + 3Cl₂ -t⁰-> 2AlCl₃

AlCl₃ + 3NaOH \(\rightarrow\)Al(OH)₃ + 3NaCl

2NaCl + 2H₂O -đpmn-> 2NaOH + Cl₂ + H₂

2NaOH + CuCl₂ \(\rightarrow\)Cu(OH)₂ + 2NaCl

tạo ra các muối có gốc là gốc của NH₄ ban đầu và NH₃ và H₂O

2NH₄NO₃ + Ca(OH)₂ \(\rightarrow\) Ca(NO₃)₂ + 2NH₃ + 2H₂O

(NH₄)₂SO₄ + Ba(OH)₂ \(\rightarrow\) BaSO₄ + 2NH₃ + H₂O

2(NH₄)₃PO₄ + 3Ca(OH)₂ \(\rightarrow\) Ca₃(PO₄)₂ + 6NH₃+ 6H₂O

(NH₄)₃PO₄ + 3KOH \(\rightarrow\) K₃PO₄ + 3NH₃ + 3H₂O

2(NH₄)2CO3 + 4KOH \(\rightarrow\) 2K₂CO₃ + 2NH₃ + 7H₂O

(NH₄)2CO3 + Ca(OH)2 \(\rightarrow\) 2NH₃ + 2H₂O + CaCO₃

Elly Phạm;Rainbow;Azue;Nào Ai Biết;Nguyen Quynh Huong;trần hữu tuyển;Rain Tờ Rym Te;Wind

Giúp em với!

a) \(S+O2\rightarrow SO2\)

2SO2+O2---->2SO3

SO3+H2O--->H2SO4

H2SO4+Na2O---->Na2SO4+H2O

Na2SO4+BaCl2---->2NaCl+BaSO4

b) 2Ca+O2--->2CaO

CaO+H2O--->Ca(OH)2

Ca(OH)2+CO2---->CaCO3+H2O

CaCO3+H2SO4----> CaSO4+H2O+CO2

CaSO4+BaCl2--->CaCl2+BaSO4

a,

\(1.\text{O2 + S → SO2}\)

\(2.\text{O2 + 2SO2 ↔ 2SO3}\)

\(3.\text{H2O + SO3 → H2SO4}\)

\(3.\text{H2SO4 + 2NaOH → 2H2O + Na2SO4}\)

\(4.\text{BaCl2 + Na2SO4 → 2NaCl + BaSO4}\)

b,

\(1.2Ca+O2\rightarrow2CaO\)

\(2.\text{CaO + H2O → Ca(OH)2}\)

\(3.\text{Ca(OH)2 + CO2 → CaCO3 + H2O}\)

\(4.\text{CaCO3 + H2SO4 → H2O + CO2 + CaSO4}\)

\(5.\text{BaCl2 + CaSO4 → CaCl2 + BaSO4}\)

Bài 1:

Axit sunfuric: H₂SO₄

Axit sunfuro: H₂SO₃

Natri hidrocacbonat: NaHCO₃

Natri hidroxit: NaOH

Sắt (III) clorua: FeCl₃

Sắt (II) oxit: FeO

Natri silicat: Na₂SiO₃

Canxi cacbonat: CaCO₃

Canxi hidrophotphat: CaHPO₄

Canxi hidrosunfat: Ca(HSO₄)₂

Natri Aluminat: NaAlO₂

Bài 2:

1) 4Na + O₂ → 2Na₂O

Na₂O + H₂O → 2NaOH

2) 2Ca + O₂ → 2CaO

CaO + H₂O → Ca(OH)₂

3) S + O₂ \(\underrightarrow{to}\) SO₂

2SO₂ + O₂ \(\underrightarrow{to}\) 2SO₃

SO₃ + H₂O → H₂SO₄

H₂SO₄ + Zn → ZnSO₄ + H₂↑

Bài 1

Viết CTHH của những chất có tên sau :

Axit Sunfuric: H₂SO₄

Axit sunfuro: H₂SO₃

Natri hidrocacbonat: NaHCO₃

Natri hidoxit: NaOH

Sắt (III) clorua: FeCl₃

Sắt (II) oxit: FeO

Natri silicat: Na₂SiO₃

Canxi cacbonat : CaCO₃

Canxi hidrophotphat: CaHPO₄

Canxi hidrosunfat: Ca(HSO₄)₂

Natri ALuminat: NaAlO₂