Second ionization constant of sulfuric acid in HO and DO from 150 to 300 °C at = 11.5 MPa using flow AC conductivity.

A custom-built flow-through AC conductivity instrument was used to measure the deuterium isotope effect on the ionization quotient of bisulfate from 150 to 300 °C, at = 11.5 MPa. Standardized solutions of KCl, HCl, KOH, KHSO, KSO, and HSO were prepared in light and heavy waters and their conductivities were measured and fitted with the Quint-Viallard conductivity model to obtain single ion conductivities at infinite dilution for K, Cl, H, OH, HSO, and SO.