The protonation of weak bases. A study of the protonation of some nitroaniline indicators and the determination of the H0 values of aqueous sulphuric acid
Abstract
The protonation of some nitroaniline indicators has been studied in aqueous sulphuric acid over the temperature range 15–55°. The log l values of these indicators decrease with increasing temperature and the pKBH+ values vary linearly with temperature. These log l and pKBH+ values have also been used to calculate the Hammett acidity function (H0) of the acid media over the temperature range 15–55°.