C2H5OH-CH3COOC2H5-CH3COOH-(CH3COO)2CA-CH3COOH рівняння реакції
CH3COOH+C2H5OH=CH3COOC2H5+H2O CH3COOC2H5+H2O=CH3COOH+C2H5OH 2CH3COOH+Ca(OH)2=(CH3COO)2Ca+2H2O (CH3COO)2Ca+2HCl=2CH3COOH+CaCl2