Carboxylic Acids羧酸
Carboxylic acids are organic acids characterized by the presence of a carboxyl group, The simplest series of carboxylic acids are the alkanoic acids, R-COOH, where R is a hydrogen or an alkyl group. Compounds may also have two or more carboxylic acid groups per molecule. 羧酸是具有羧基的有机酸，最简单的羧酸系列是烷酸，其结构为R-COOH，其中R可以是氢原子或烷基基团。化合物也可能在一个分子中含有两个或更多的羧酸基团。
Carboxylic acids are typically weak acids that only partially ionize in water. For example, acetic acid is only 0.02% dissociated in aqueous solution at room temperature. 羧酸通常是弱酸，它们在水中仅部分电离。例如，在常温下，乙酸在水溶液中的电离度仅为0.02%。
Salts and anions of carboxylic acids are called carboxylates. 羧酸的盐和阴离子被称为羧酸盐
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