|−|A '''conjugate base''' is the negatively charged [[ion]] which results from an [[acid]] donating a [[proton]] (H<sup> +</sup> ). This ion acts as a [[base]], with a strength inverse to the strength of the original acid. An example conjugate base is a [[nitrate]] ion (NO< sub> 3</ sub><sup> -</sup>) , which is formed when [[nitric acid]] (HNO< sub> 3</ sub> ) gives up its proton. |+|
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Revision as of 17:54, 2 August 2009
Consider the pair of molecules HX and X−. X− can react to form HX, and vice versa, through an acid-base reaction. Thus, X− is the conjugate base of HX (and HX is the conjugate acid of X−.)
X− acts as a base, with a strength inversely proportional to the strength of its conjugate acid.