1/
$C_2H_4+ \frac{1}{2}O_2 \buildrel{{xt, t^o}}\over\to CH_3CHO$
$CH_3CHO+H_2\buildrel{{Ni, t^o}}\over\to CH_3CH_2-OH$
$CH3CH_2OH+ CuO \buildrel{{t^o}}\over\to CH_3CHO+ Cu+H_2O$
$CH_3CHO+Br_2+H_2O\to CH_3COOH+2HBr$
2/
$C_2H_4+ \frac{1}{2}O_2 \buildrel{{xt, t^o}}\over\to CH_3CHO$
$CH_3CHO+H_2\buildrel{{Ni, t^o}}\over\to CH_3CH_2-OH$
$CH_3CH_2OH+O_2\buildrel{{\text{men giấm}}}\over\to CH_3COOH+H_2O$
$2CH_3COOH+Ca\to (CH_3COO)_2Ca$
3/
$C_2H_4+H_2O\buildrel{{H^+, t^o}}\over\to C_2H_5OH$
$CH3CH_2OH+ CuO \buildrel{{t^o}}\over\to CH_3CHO+ Cu+H_2O$
$CH_3CHO+Br_2+H_2O\to CH_3COOH+2HBr$
$CH_3COOH+C_2H_5OH\buildrel{{t^o}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$
4/
$C_2H_4+ \frac{1}{2}O_2 \buildrel{{xt, t^o}}\over\to CH_3CHO$
$CH_3CHO+H_2\buildrel{{Ni, t^o}}\over\to CH_3CH_2OH$
$CH_3CH_2OH+O_2\buildrel{{\text{men giấm}}}\over\to CH_3COOH+H_2O$
$CH_3COOH+C_2H_5OH\buildrel{{t^o}}\over\rightleftharpoons CH_3COOC_2H_5+H_2O$
