羧酸
羧酸（英语：Carboxylic acid），有机酸个一种，是带有羧基个有机化合物，通式是R-COOH。羧基个化学式为-C(=O)OH，通常写成-COOH或-CO2H，渠是由一个羰基（>C=O）搭一个羟基（-O-H）组成个官能基。
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