Carboxylate

A carboxylate is the conjugate base of a carboxylic acid,  (or ). It is an ion with negative charge. Carboxylate ions are made when a carboxylic acid loses a hydrogen ion. Such acids usually have pKa of less than 5, meaning that many bases, such as sodium hydroxide or sodium bicarbonate can remove the hydrogen ions from them.

RCOOH + NaOH → RCOONa + H2O

Examples
Some examples of carboxylates include;
 Formate, 
 Acetate, 
 Oxalate, 
 Citrate, 

Category:Carbon compounds
Category:Oxyanions
Category:Carboxylate anions