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丙种维生素(抗坏血酸)化学结构上并不含羧基(COOH),其所以有酸性,是由烯二醇能离解两‘氢离子’:
Vitamin C (ascorbic acid) chemical structure does not contain carboxyl (COOH), it is acidic, is from ethylene glycol can dissociate two ’hydrogen ions’: