Die Acidität der schweren Halogenwasserstoffe und der Perchlorsäure in Essigsäure als Lösungsmittel

The activities of HCl, HBr and HJ were determined in 10 −2 ‐ M solutions of the hydrogen halides in water‐acetic acid mixtures ranging from 0 to 99,9% CH 3 COOH using the galvanic cell:\documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Pt, H}_{\rm 2} {\rm | solution | AgX, Ag}{\rm .} $$\end{document}From the potentials the quantity pw⊕ was derived as a measure of acidity and compared with H AMMETT ' S acidity function determined with the aid of p‐nitraniline and o‐nitraniline. Acidity measurements were also carried out in 10 −2 − M HClO 4 ; 10 −2 − M HCl + 10 −2 − M HClO 4 ; 10 −2 ‐ M HClO 4 + 10 −1 ‐ M (CH 3 ) 4 Cl; 10 −2 ‐ M NaOH + 10 −1 ‐ M N(CH 3 ) 4 Cl, using the same series of solvents.