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Ответ:

Объяснение:

СH3-C(O)-CH3 + PCl5 -> CH3-C(Cl)(Cl) - CH3 + POCl3

CH3-C(Cl)(Cl)-CH3 + 2NaOH -> CH=-C-CH3 + 2NaCl + 2H2O

CH=-C-CH3 + 2HCl -> CH3-C(Cl)(Cl)-CH3

CH3-C(Cl)(Cl)-CH3 + 2NaOH -> CH3-C(O)-CH3 + 2NaCl +H2O