Studies on the application of the quinhydrone electrode in formamide. I. The ionization constant of acetic acid from E.M.F. measurements at 25°

Abstract

The quinhydrone electrode in conjunction with the silver-silver chloride electrode has been used in the cell            Ag-AgCl | NaCl(m₃), CH₃CO₂Na(m₂), CH₃CO₂H(m₁), QH₂-Q | Pt to redetermine the ionization constant of acetic acid in formamide. The ionization constant is found to be 1.096 x 10^-7 and is in good agreement with the value 1.230 x 10^-7 obtained from the study of the cell            Pt, H₂|CH₃CO₂H(m₁), CH₃CO₂Na(m₂), NaCl(m₃)|AgCl-Ag The results confirm the reversibility and reproducibility of the quinhydrone electrode in formamide.