Wikipedia - Acid catalysis (en) Wikipedia - Catalyse acide ou basique (fr) Wikipedia - Katalyse (de) Wikipedia - Kyselá katalýza (cs) general acid catalysis

https://doi.org/10.1351/goldbook.G02609
The @[email protected] of a chemical reaction by a series of @[email protected] (which may include the solvated hydrogen ion) so that the rate of the catalysed part of the reaction is given by $$\sum k_{\text{HA}}\ [HA]$$ multiplied by some function of @[email protected] concentrations. (The acids HA are unchanged by the overall reaction.) General @[email protected] by acids can be experimentally distinguished from @[email protected] by hydrogen cations (@[email protected]) by observation of the @[email protected] as a function of buffer concentration.