Chọn đáp án D

CH₃CH₂OH (C₂H₆O) → CH₃CHO → CH₃COOH → CH₃COOCH₃

Chọn đáp án D

Đáp án B

Fe \(\rightarrow\) FeCl3 \(\rightarrow\) Fe(OH)3 \(\rightarrow\) Fe2O3 \(\rightarrow\) Fe2(SO4)3

Fe+\(\frac{3}{2}\)Cl2\(\underrightarrow{^{to}}\) FeCl3

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

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

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

1) S-->SO2--->SO3----->H2SO4--->Na2SO4

S+O2----->SO2

2SO2+O2--->2SO3

SO3+H2O---->H2SO4

H2SO4+2NaOH--->Na2SO4+2H2O

2) a)Fe--->FeCl3------>Fe(OH)3----->Fe2O3----->Fe2(SO3)3

2Fe+3Cl2---->2FeCl3

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

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

Fe2O3+3H2SO4----->Fe2(SO4)3+3H2O

b) Câu này k viết dc nha

Ý b của bạn thiếu Cu nhé :

Sắp xếp :

\(CuO\rightarrow Cu\rightarrow CuCl_2\rightarrow Cu\left(OH\right)_2\rightarrow CuSO_4\rightarrow Cu\left(NO_3\right)_2\)

Viết phương trình :

\(CuO+CO\rightarrow Cu+CO_2\)

\(Cu+Cl_2\rightarrow CuCl_2\)

\(3CuCl_2+2Al\left(OH\right)_2\rightarrow3Cu\left(OH\right)_2\downarrow+2AlCl_3\)

\(3Cu\left(OH\right)_2+2Fe\left(SO_4\right)_3\rightarrow3CuSO_4+2Fe\left(OH\right)_3\downarrow\)

\(CuSO_4+Ba\left(NO_3\right)_2\rightarrow Cu\left(NO_3\right)_2+BaSO_4\downarrow\)

1) \(C+O2-->CO2\)==>Pư hóa hợp

\(2Mg+O2-->2MgO\)==>Pư hóa hợp

\(4Al+3O2-->2Al2O3\)==>Pư hóa hợp

\(C2H6+\frac{7}{2}O2-->2CO2+3H2O\)

\(C2H2+\frac{5}{2}O2-->2CO2+H2O\)

2)

\(3Fe+2O2-->Fe3O4\)

\(S+O2-->SO2\)

\(CH4+2O2-->CO2+2H2O\)

\(2Cu+O2-->2CuO\)

\(4P+5O2-->2P2O5\)

\(C3H8O+\frac{9}{2}O2-->3CO2+4H2O\)

\(C4H10+\frac{13}{2}O2-->4CO2+5H2O\)

\(C7H16+11O2-->7CO2+8H2O\)

C₂H₄ + H₂O \(\xrightarrow[Axit]{xt}\) C₂H₅OH (X: C₂H₄)

C₂H₅OH + O₂ \(\xrightarrow[giấm]{men}\) CH₃COOH + H₂O (Y: CH₃COOH)

2CH₃COOH + Na₂O → 2CH₃COONa + H₂O

CH₃COONa + NaOH \(\xrightarrow[CaO]{to}\) CH₄ + Na₂CO₃ (Z: CH₄)

2CH₄ \(\underrightarrow{to}\) C₂H₂ + 3H₂

Chuỗi phản ứng

S-->SO2---->SO3--->H2SO4--->Na2SO4

PT

S + O2--->SO2

3SO2 + O2-->2SO3

SO3 + H2O -->H2SO4

H2SO4 +2 NaOH--->Na2SO4 + 2H2O

S => SO2 => SO3 => H2SO4 => Na2SO4

S+O2 (t*)= SO2

SO2+ 1/2O2 <--(t*/ V2O5)--> SO3

SO3+ H2O= H2SO4

2NaOH+ H2SO4= Na2SO4+ 2H2O