Acetic acid, like all carboxylic acids, reacts with metals and their oxides to release the corresponding salt.
Reaction with metals:
2CH3COOH + Zn = (CH3COO) 2Zn + H2 ↑, zinc acetate and hydrogen are formed.
Reaction with oxides:
2CH3COOH + CuO = (CH3COO) 2Cu + H2O, copper (II) acetate and water are formed.
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