2. 

C2H4 + H2O $\xrightarrow[]{axit}$ C2H5OH (Chỗ này mình nghĩ là etilen mới đúng :V)

C2H5OH + O2 $\xrightarrow[]{mengiam}$ CH3COOH + H2O

2CH3COOH + Zn → (CH3COO)2Zn + H2↑

CH3COOH + C2H5OH $\buildrel{{H2SO4đ,t^o}}\over\rightleftharpoons$ CH3COOC2H5 + H2O

CH3COOC2H5 + NaOH $\xrightarrow[]{t^o}$ CH3COONa + C2H5OH

3. 

$(\kern-6pt- C_6H_10O_5 -\kern-6pt)_n$ + nH2O $\xrightarrow[axit]{t^o}$ nC6H12O6

C6H12O6 $\xrightarrow[30-35^oC]{menruou}$ 2C2H5OH + 2CO2↑

C2H5OH + O2 $\xrightarrow[]{mengiam}$ CH3COOH + H2O

CH3COOH + C2H5OH $\buildrel{{H2SO4đ,t^o}}\over\rightleftharpoons$ CH3COOC2H5 + H2O

CH3COOC2H5 + H2O $\xrightarrow[]{H2SO4l,t^o}$ C2H5OH + CH3COOH

4. 

C2H5OH + O2 $\xrightarrow[]{mengiam}$ CH3COOH + H2O

CH3COOH + C2H5OH $\buildrel{{H2SO4đ,t^o}}\over\rightleftharpoons$ CH3COOC2H5 + H2O

CH3COOC2H5 + H2O $\xrightarrow[]{H2SO4l,t^o}$ C2H5OH + CH3COOH

*Bạn tham khảo!

Đáp án + Giải thích các bước giải:

$2)$

$CH_2=CH_2+H_2O\xrightarrow{t^o,axit}CH_3-CH_2-OH$

$C_2H_5OH+O_2\xrightarrow{men\,giấm}CH_3COOH+H_2O$

$Zn+2CH_3COOH\to (CH_3COO)_2Zn+H_2$

$CH_3COOH+C_2H_5OH\buildrel{{t^o,H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$

$CH_3COOC_2H_5+NaOH\xrightarrow{t^o}CH_3COONa+C_2H_5OH$

$3)$

$(C_6H_{10}O_5)_n+nH_2O\xrightarrow{t^o,H^+}nC_6H_{12}O_6$

$C_{12}H_{22}O_{11}+H_2O\xrightarrow{t^o,H^+}C_6H_{12}O_6+C_6H_{12}O_6$

$C_6H_{12}O_6\xrightarrow{t^o,enzim}2C_2H_5OH+2CO_2$

$C_2H_5OH+O_2\xrightarrow{men\,giấm}CH_3COOH+H_2O$

$CH_3COOH+C_2H_5OH\buildrel{{t^o,H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$

$CH_3COOC_2H_5+NaOH\xrightarrow{t^o}CH_3COONa+C_2H_5OH$

$4)$

$C_2H_5OH+O_2\xrightarrow{men\,giấm}CH_3COOH+H_2O$

$CH_3COOH+C_2H_5OH\buildrel{{t^o,H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$

$CH_3COOC_2H_5+NaOH\xrightarrow{t^o}CH_3COONa+C_2H_5OH$

$CH_3COOC_2H_5+H_2O\buildrel{{t^o,H_2SO_4}}\over\rightleftharpoons CH_3COOH+C_2H_5OH$