Acidity function calculations for iodic acid and nitric acid

Abstract

Values of the Hammett acidity function, H₀, have been calculated for iodic acid and nitric acid using an equation previously derived from the hydration model for the proton suggested by Wyatt. The calculated H₀ values are compared with the measured values in order to test the hydration hypothesis, and reasonable agreement is obtained. The effect upon the H₀ values of complex anions of the type A^–,HA has been calculated, and while the effect is small the agreement between the calculated and measured H₀ values is marginally better when this is included.