What is Carboxylate?
[[File:Carboxylate-resonance-hybrid.png|thumb|Carboxylate ion. The dotted line means there is [[Chemical resonance|resonance]].]] A '''carboxylate''' is the [[conjugate base]] of a [[carboxylic acid]], RCOO− (or RCO−2). It is an [[ion]] with negative charge. Carboxylate ions are made when a carboxylic acid loses a hydrogen ion. Such [[acid]]s usually have [[pKa]] of less than 5, meaning that many [[Base (chemistry)|base]]s, such as [[sodium hydroxide]] or [[sodium bicarbonate]] can remove the [[hydrogen|hydrogen ions]] from them. RCOOH + NaOH → RCOONa + H2O ==Examples== Some examples of carboxylates include; * [[Formate|Formate ion]], HCOO− * [[Acetate|Acetate ion]], CH3COO− * [[Methanetetracarboxylate|Methanetetracarboxylate ion]], C(COO−)4 * [[Oxalate|Oxalate ion]], (COO)2− [[Category:Carbon compounds]] [[Category:Ions]] {{Chemistry-stub}}