$C_{2}H_{5}OH +O_{2} \buildrel{{25-30^oC,\text{men giấm}}}\over\longrightarrow CH_{3}COOH+H_{2}O$
$CH_{3}COOH+C_{2}H_{5}OH ↔ (H_{2}SO_{4}đ,t^o) CH_{3}COOC_{2}H_{5}+H_{2}O$
$CH_{3}COOC_{2}H_{5}+H_{2}O \buildrel{{H^{+}}}\over\longrightarrow CH_{3}COOH+C_{2}H_{5}$
$CH_{3}COOH+Na \to CH_{3}COONa+1/2H_{2}$