Discuter:Puissance acide

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[modifier] Définition depuis un brevet

Trouvé sur Catalyst and Process for the Production of Acetic Acid. Je le mets ici vu que ça vient d'un brevet. Je ne traduis pas, car je n'ai pas un niveau suffisant en chimie.

« Ho value of an acidic substance is measured using indicators that are weak bases (B) such aso-nitroaniline or 2,4-dinitroaniline. The weak base is (partly) converted in the acidic substance to the conjugate acid of the base (BH+). The value of [BH+]/[B] is typically measured by spectrophotometric means. By using the known pK in water for the base, Ho can then be calculated for the acidic substance. Acidic substances with -Ho values above about 12 are referred to as superacids. Superacids are upward of 106 times as strong as a 1 molar aqueous solution of a strong acid. Acids with a-Ho of greater than 12.1 (measured as the pure acid), are suitable for use in the process of the present invention. »