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A '''conjugate acid''' is the [[molecule]] which results from a [[base]] accepting a [[proton]] (H⁺). This molecule acts as an acid, with a strength inverse to the strength of the original base. An example conjugate base is an [[ammonium]] ion (NH₄⁺), which is the result of [[ammonia]] (NH₃) reacting with an [[acid]].

Consider the pair of molecules HX and X⁻. HX can react to form X⁻, and vice versa, through an [[acid-base reaction]]. Thus, HX is the conjugate acid of X⁻ (and X⁻ is the conjugate base of HX.)

 

HX acts as an acid, with a strength inversely proportional to the strength of its conjugate base.

==See Also==

==See Also==