Talk:Acidic power
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[edit] Definition from a patent
Found on Catalyst and Process for the Production of Acetic Acid. I put it here as this is from a patent file.
| “ | 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. |
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