1)HC≡СН + H2O = H3C-CH=O (условия - соли ртути Hg(2+), среда подкисленная)
H3C-CH=O + H2 = H3C-CH2-OH
2)5C2H5OH + 4KMnO4 + 6H2SO4 → 5CH3COOH + 2K2SO4 + 4MnSO4 + 11H2O
3)CH3COOH + CH3OH = CH3COOCH3 + H2О
4) CH3COOCH3 + NaOH = CH3COONa + CH3OH
CH3COONa + NaOH = CH4 + Na2CO3 (температура, сплавление)