$a)\\ C_2H_4+H_2O\xrightarrow{H^{+},t^o} C_2H_5OH\\ C_2H_5OH+O_2\xrightarrow{men\ giam} CH_3COOH+H_2O\\ 2CH_3COOH+2Na\to 2CH_3COONa+H_2\\ CH_3COONa+HCl\to CH_3COOH+NaCl\\ b)\\ C_2H_2+H_2\xrightarrow{Lindlar,t^o} C_2H_4\\ C_2H_4 +H_2O\xrightarrow{H^{+},t^o} C_2H_5OH\\ C_2H_5OH+O_2\xrightarrow{men\ giam} CH_3COOH+H_2O\\ CH_3COOH+C_2H_5OH \buildrel{{H_2SO_4(dac),t^o}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$

`C_2H_4+H_2O \overset(t^o,H^+)(->)C_2H_5OH`

`C_2H_5OH+O_2 \overset(25-30^oC, men giấm)(->)CH_3COOH+H_2O`

`2CH_3COOH+2Na->2CH_3COONa+H_2`

`CH_3COONa+HCl->CH_3COOH+NaCl`

`---`

`C_2H_2+H_2 \overset(t^o,Pd)(->)C_2H_4`

`C_2H_4+H_2O \overset(t^o,H^+)(->)C_2H_5OH`

`C_2H_5OH+O_2 \overset(25-30^oC,men giấm)(->)CH_3COOH+H_2O`

$CH_3COOH+C_2H_5OH\buildrel{{H^+}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$