conjugate acid

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con·ju·gate ac·id

the protonated compound of two compounds that differ in structure only by the presence of the labile proton.
References in periodicals archive ?
Each of the individual explanations could remind the student that the equilibrium process between the weak acid and its conjugate base is always happening, but at different positions.
We found that the students interviewed had difficulty in realizing that the graph of pH effect on Acid-Base Equilibria dealt with an acid and its conjugate base, rather than a reaction (such as a titration) between two separate species.
Some of the recent discoveries that have led to a renaissance in the field of organocatalysis, including the development of chiral Bronstead acids and Lewis acidic metals bearing the conjugate base of the Bronstead acids as the ligands and the chiral bi-functional acid/base catalysts